We are looking into getting our first RV next year and so I am doing my research! We want to take advantage of camping in the state and national parks but I am confused regarding RV lengths allowed. I've seen some sites listed as a combined length for example of 40 feet. We will be purchasing a 5th wheel so does that mean we can't be longer than 40 feet for the 5th wheel and truck? We are deciding between a 34' or 38' 5th wheel so it sounds like we will be out of luck either way if we need to include the truck length? Thanks for any clarification you can offer!