Mountain Hardwear - Lamina Eco AF™ 30F/-1C

My preferred trip time is late September. I use a 30deg Lamina bag from Mountain Hardware with a Klymit Static Luxe pad. I generally sleep a little hot and prefer a cooler ambient. Weather will be your biggest obstacle: In 2021 I had an entire week of 80+ days and 60+ nights. I did not plan for that heat; slept on top of the bag the whole week. Last Sept I had a couple 25deg nights with high winds that were blowing in under the fly. I slept in my wools and on my belly with the face hole face-down and it was still a little cooler than I’d prefer with that wind cutting in. I’ll be adding a lightweight quilt to the kit for the future. (Everything was perfect for me tho on those 40ish deg nights!)

I have the marmot sleeping bag and the lamina sleeping bag you reference here. While I was in the military I was taught ounces are pounds. That said, for your purposes these two sleeping bags are fairly negligible either way for your purposes. I like how small the marmot packs down, but I use the lamina more in all sorts of weather. It’s more comfortable to sleep in. I would say you are fine with sticking with the lamina until you decide just how much you like hiking and camping and then spend a little more time to build out your kit list and budget then go from there.

Welcome! I love the lamina, and it’s pretty versatile in my opinion. Is it “top of the line” no, is it comfortable yep!!!

Mountain Hardware has a couple bags that are compatible, my wife and I use them. They are a little bulkier, but affordable. You could also look at something like the Zenbivy Double bed.

I have the Mountain Hardwear and love it. My kid has a North Face Inferno and loves it… and I worry less about water damage. I trust OutdoorGearLab.com for reviews. 

It's really a personal choice. I would suggest you try the MH sleeping bag. It's a free way to test a type of sleeping bag. Worst case, you buy another one later. I personally use down sleeping bags because they are lighter and compress better. But they are more expensive and take a lot longer to dry if it gets wet.