As well as the bunk beds, the double bed in the bedroom, and the double murphy bed in the living room, there is a love seat, where your 5 year old could sleep. That being said, I doubt it if all of you were crammed into the cabin, that you would enjoy yourself. We had 6 in our party, and that was plenty in a small space like a cabin. The washroom could be a problem for 7, but I think that could be the least of your worries. If you don't have proper documentation at the entrance to the parks, or if you get caught, it could spoil your vacation. Do you really want to take that chance? I would suggest you get connecting rooms at a value resort, for about the same price as you may be paying for Fort Wilderness.