
The North Face
Wawona 6
Spacious vestibule, strong in storms, but rainfly tricky solo.

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Sundome is much lower quality than the other options. If you're looking at Coleman, step up to at least the Skydome. Funny enough I was going to recommend the Basecamp. Ventilation isn't great with the fly on but that's very common with cheap tents. I like wooded campsites anyway where you can angle the mesh portions of the tent into the trees and keep the non-mesh facing the walkway for privacy. Kelty kinda owns the cheap-but-mostly-quality space. The Discovery Trail 3P is very meshy which helps with ventilation but still a lack of fly vents. If you can stretch the budget or find a good sale, the Kelty Rumpus 4 is a killer deal. Lots of ventilation, vented fly, and a great vestibule that you can keep wide open to help with ventilation. The Teton looks fine. I like the look of the higher denier fabric and vented fly. Teton has historically been a cheap crap brand but they've really made some improvements in the last few years. I don't love that their "lifetime warranty" explicitly mentions that things like bent poles are considered normal wear. The marmot is an excellent option if you can get it at a good price and you're genuinely okay with a 2p.
Mine was 10 or 11. He’s in a Kelty Discovery Basecamp 4. It was relatively inexpensive and he can set up and break it down independently! Also big enough for a friend or two when we camp with a bigger group.
I like kelty stuff, my bigger tent is the base camp 4 and it’s held up really well to a lot of water. It doesn’t have a vestibule, which I really wish it did but I can always throw a tarp up to make one. Super easy setup, good for the price. My new backpacking tent is likely to be a kelty, I just can’t beat the price and I’m not an ultralighter or a thru hiker so a 4 and a half pound tent is perfectly fine for me. It’s somewhere between Coleman and rei brand in quality. The only kelty thing I’ve had some trouble with (and really this isn’t a serious issue) is that my 20 degree down sleeping bag is only comfortable to about 40 and then I can really feel the cold. And I think some of that is due to not storing it properly for the first year I had it and not having a high enough r value pad.
Do you backpack? I have a kelty base camp 4 and it’s held up really really well. I like kelty gear a lot, it’s pretty mid range but good for the price imo
I have two tents (both kelty brand) a two person for solo backpacking/short trips where bad weather isn’t forecast and a 4 person for trips where I have another person in the tent with me or I plan on having to spend more time in the tent. Totally a reasonable move and the bigger tents really aren’t usually much harder to set up unless you have some huge 10 person multi room situation
REI has a kelty pack that comes with a kelty 4 person tent, 2 sleeping pad, and 2 sleeping bags. It is around 300 I think. At least in the US. I've used it for years and it's a good tent. The sleeping bags are fine for the summer. You may want a nicer sleeping pad, but it will work until you get something nicer.
I love my kelty discovery basecamp. It's dumb easy/quick to set up - two poles and everything is color coded (rain fly yellow straps are the front and clip into the yellow clips). I just used it on a road trip where we set up and broke down every night and it was honestly the easiest part of that situation. We have the 6, it's a good budget quick tent! We comfortably slept 2 adults and 2 kids on air mats with room for bags at the bottom.
How long is a long trip, and what are the concerns of failing? Most tents can last a good long time without issue. Make sure you are thinking about takedown time as well, just because it's fast up doesn't mean it'll be fast down as well. We did a month last summer plus a bunch of weekends in a Kelty tent, which I could set up and take down on my own in under 5 mins. Two poles, color coded, didn't cost me one zillion dollars, easy to get back into the bag without folding it perfectly. I think you're overthinking this.
Also kelty tents come in these great shark mouth bags so you can jam the tent back in without perfectly folding it to fit.
Check out Kelty. Bought a basecamp model and it's great. Big enough to stand up in. Room for cots which gives you storage space underneath the cots...

The North Face
Wawona 6
Spacious vestibule, strong in storms, but rainfly tricky solo.

Gazelle Tents
T4 Hub Tent Series
Fastest setup, durable, but bulky and awkward door.

Durston
X-Mid 2
Ultralight, spacious 2P, but not for very strong winds.

Durston
X-Mid 1
Budget ultralight 1P, spacious, but large footprint.

Naturehike
Mongar 2 Backpack Tent (Nylon)
Budget 2P, spacious for price, but not for 4 seasons.

Ranked #1
Durston - X-Mid 2

Ranked #1
Gazelle Tents - T4 Hub Tent Series

Ranked #1
Gazelle Tents - T4 Hub Tent Series

Ranked #1
Durston - X-Mid 2

Ranked #1
Durston - X-Mid 2

Ranked #1
SlingFin - Portal 2