I have found that truck stops,, the bigger ones have areas where we can rest for a few hours without having to break up the combo. Most times I will disconnect the boat at the boat launch parking lot or near my site if there is room,, Then I will work my trailer over as far as I can to fit the boat in there.. Some places do not allow this and I have to rent a boat slip which includes trailer parking.
Or as I said,, I will dock boat and make room at camp site for trailer.. HAve not had an issue yet!