Some responses here remind me of when I rented a 12 passenger van and they tried to give me 2 cars because they didn't have the van when I got there. Defeats the whole purpose of me renting the van! I'm guessing the couples have made up their mind and are looking for info on what trailer may best suit them. Not whether or not it's a good idea or doable.
I agree with those who said look for more than 1 bathroom and go from there. Also the toy hauler which has the beds that drops down or opens up into a big one seems better than a bunk house. That class C towing a trailer seems pretty reasonable but I'm guessing they want a non RV to get around in at their destinations.