Big Agnes Copper Spur HV UL2 vs Tarptent Rainbow

Regarding the question of floor size. Apart from weight, one of motivations for 'upgrading' from my 20 year old tent (that I also loved) was because my partner was insisting on having a bit more interior space, especially for the longer treks. Before purchasing, I measured out the advertised dimensions on my garage floor and saw that my old tent was well inside the boundary limits, the CS UL2 had plenty of extra width and length when compared. And yet on the trail, there wasn't as much space as expected

The few tents that weigh less than the Double Rainbow—like the Nemo Hornet, REI Flash Air, and Big Agnes Tiger Wall and Fly Creek—are made with significantly less durable fabrics. That said, it’s worth noting that the Double Rainbow does not come seam-sealed (you can have Tarptent do the service for $35 or purchase a kit to do it yourself for $8), so total weight will go up a little as a result. In terms of packed size, the Double Rainbow is a standout. The thin materials, hybrid single-wall build, and simplistic pole design keep things extremely compact

We use this for two of my kids when backpacking. Very reasonable weight when split between two people. If you want to still be in one tent as your kid gets older, though, a 3p tent may be a little tight.

I ended up getting a Big Agnes Fly Creek 2, and it’s not perfect but it works well in those humid conditions—but the trade-off is that it’s heavier than a UL single wall tent. Others might have different and better experiences with single wall tents but I just really couldn’t stand the condensation.

A couple of my friends have the previous version of this and having experienced both, the 2020 version has some cool new features:

I dig that tent feature - both of my tents have similar capabilities - Hilleberg Anjan can do the same, and my solo is Tarptent Rainbow which has a porch mode that you can use when it is raining as long as it is not too windy - in which case you can have the view and cook despite wet weather! Heck, stick a chair under the porch.