Zpacks - Triplex Classic

I would buy this https://zpacks.com/products/triplex-classic-tent I have the Duplex Classic and regret nothing.

The build quality on the Durston X-Mid is phenomenal as is their company support. I had the X-Mid 2+ And it's nothing shorter will built tent. The one issue I had with it was promptly addressed by the company and to more than my satisfaction. However, I just don't think the Durston is a good fit for the AT. The walls of the fly are so low to the ground and the vents at the top are just not sufficient enough to get air flowing through the tent to remove humidity effectively in a high humidity environment like the Eastern United States. I personally carried mine from Harpers ferry West Virginia to Kent Connecticut and found myself rapidly switching back to my Z-Packs triplex - The 2+ and the Triplex we're bigger because I was hiking with my daughter so we could share a tent. The zpacks triplex has a lot more ventilation and let a lot more air through so I didn't have to worry about it raining inside with condensation on the inner tent walls compared to the Durston. If I did hiking out west like the Colorado Trail or the PCT or the CDT or fill in the blank where there's less ambient humidity I would without hesitation take the Durston back out there. But my opinion take it for what it's worth or feel free to ignore it is the Durston just does not breathe well enough in the Eastern United States to keep interior humidity under control. Too many mornings I woke up with a wet sleeping bag because it was raining inside the tent... And that's not because there was any sort of leak or poor construction.

My 3-person (2-person if you like broader sleeping pads) tent weighs 600 gram (0,6 kg). Zpacks Triplex. 3 kilo I won’t even take on the bike, let alone on my back.

I have used both a triplex (on the GDT with my wife and baby) and a locus gear khafra 4p mid tent for a LASH on the PCT (with wife, 4 year old, baby).  Not the same age as your family but honestly I think the older kids will be easier.  The triplex is nice having an integrated bug net. It's spacious. It's also a pain in my opinion to pitch. But at least you can open the vestibules and get some breeze. The 4p mid was roomy. I made a perimeter net and a floor of my own. The weight was the same as the triplex and the footprint more or less the same. But having a perimeter net, if you open the door for ventilation there is no bug protection. it has bomber head room though.  You can get a full inner for those tents. Those are just heavier than a perimeter net. Also look into tarptent options.  All depends on your style and objectives.

This is true and I'm not sure what the typical lifespan is of DCF but I've had my tents last longer than this with somewhere between 0 pinholes and two.  My duplex - at least as many nights as yours. Zero pinholes.  My triplex - similar nights as duplex. One pinhole.  My Locus Gear Khafra - 0.5 oz DCF - bought used with unknown life before. Used by me so far for over 120 nights. Two pinholes.  Not sure if they are from the material degrading or from incidents. They are easily patched on trail (way easier than silpoly IMO) and our holes haven't shown any progression or escalation. I get a hole. Patch it. That's it.  But I don't know how my experience stacks up to others. Just wanted to put it here for reference for others looking at this 

The lightest tent out there is the zpacks triplex. I have the duplex. It’s incredibly light. It’s a trekking pole tent. I’ve flown with poles before and didn’t have an issue. Or you could buy poles when you land.

did 1300 miles of the Appalachian Trail with my wife joining me for parts. bought a 3 person ultralight from z-packs, was great for both, and really roomy for me alone, not much heavier than the 2 person, only downer was footprint required made it a little less flexible for sites. it was a bit expensive, but worth it for us.

I think it's important to consider your size. If you're both slender and average height a 2-person is fine. My wife and I use a small 2-person from zpacks and it's plenty of room for ultralight. We're both about 6 ft tall. I carry everything to reduce her weight. Packs stay under fly flaps outside. My bro in law is almost 7 feet tall and when we hike we use a much bigger tent for 2. I'll take tent, he takes stakes.

Camping Gear covers so many areas, but I assume you mean your sleep kit and mess kit. Ultralight Backpacks: HMG (Hyperlite Mountain Gear), Z-Packs, Gossamer Gear Traditional Backpacks: Osprey, Gregory, Deuter is ayt Tents: Durston Gear, HMG, Z-Packs (Budget Tents: 3F UL Gear / Naturehike) Sleeping Bag: Western Mountaineering, NEMO, Feathered Friends, Therm-a-Rest Budget SB's: Naturehike) Sleeping Pad: NEMO, Therm-a-Rest, Sea to Summit (Budget: Naturehike) Pillow: Sea to Summit (Budget: Naturehike) Stove: MSR, JetBoil (Budget: Naturehike) Water Filtration System: Sawyer Squeeze, Lifestraw Sorry, but The North Face doesn't really excel in this area. The only exception is their Summit Series Line; they've leaned more towards streetwear, in my opinion. Plus, they've pulled out of local distribution in the Philippines. Just in Case you're asking about clothes and shoes, too easy. Arc'teryx, Outdoor Research, Norrona, Patagonia, Mammut, Rab (Budget: Decathlon, Naturehike, Ukay) Shoes: Salomon... and second, Hoka. (Budget: Same Brands but Ukay)

DCF tent from Zpack. I have been thru some big storms with these and no failures if guyed out well.