I don't think we will survive a week on the road

My husband really wants us to go on an RV trip together and our 3 boys. Biologically our 4 year old is both of ours. My 15 and 17 year old are my ex's. My husband is turning40 and so badly wants us to go on a week long road trip. It just sounds like a disaster. First my 2 older boys would be sharing a bed and my17 year old has an overactive bladder and still pees his bed. Also those 2 could not last cramped together in an RV for a week without murdering each other. Plus my 4 year old has trouble sleeping in new places. And my husband is terrible at navigation and will just get us lost. Idk guy. What do you think?