When we went from a 30 footer to our 36' camper there was no great difference, aside from being a whole lot more comfortable to camp in. It does require a bit more planning before pulling in for gas, but that's not a big deal.
However, we live in a NF, so SP campgrounds aren't in our camping plans. Just today we discussed getting a shorter trailer with more slides. That would give us more models to choose from without giving up too much, if any, square footage.
'11 Eagle 320RLDS
'02 F350 PSD Dually 4WD
DW's Ride, '13 Expedition