A while ago I considered renting a popup to try it out, see if the family liked it. After a reading of the rules, i.e. return clean (well, I wanted to camp on the beach), return by 10 am or pay for the day (i'm camping 4 hours away).. I decided it was too much hassle and just bought one of my own. I wasn't looking for a specific model, but a specific feature set, though. And since I was already leaning toward buying something, I figured I'd just apply the rental cost to the camper.
Any mid sized city should have a rental option or two.. And I imagine some dealers do rentals too.
1995 Toyota 4Runner SR5 4WD 5 spd
2002 Eagle Summit 12