Thank you all for the replies!
We camp now without AC so I think we would be fine with even the little bit in a popup (we keep our therm at home at 80, even). And we live in humid, hot SE Texas so we are used to high temps.
I'm thinking we would probably leave the "table" as a bed and not bother to put it down.
It's not that tent camping is a horrible pain as much as it is difficult and time consuming to try and pack tents, air mattresses, etc, etc. We are to the point where we need a trailer just to carry gear and so much set up takes forever.
5 of the kids are elementary age and 2 of those are still baby/toddler, so they pack pretty well as sardines