We've been married for 30 years and have been RV'ing for just a few years so my experience is more in general about traveling and not really about RV's......
Don't travel hungry! With an RV we have found that it's fun to stop at a park or something and eat from the RV but we also like to park out of the way at ROFO's or WAWA and purchase food inside then eat in the camper. It can be fun and is definitely relaxing!
Don't stay angry! Have fun.
Don't keep traveling when someone has to answer the call of nature!!! Find a place to pull over and get 'er done!!!
My DW personally likes to have some sort of plan for a stop. She is a very social animal and requires people. I on the other hand do not.... at all. We find the happy middle and plan some things but also have some down time built in whether it is an overnight stop or a destination.
Do the planning together!!
Marty