I rarely leave my boat on the lake overnight. I sleep so much better when it is on the trailer.
We don't have a TC, so I can't help with that. But I do know that the boating community is usually willing to help each other out. If launch/retrieve is an issue with a camper (and I don't think it is), you could always buddy up to someone in the campground that has a solo truck/SUV, and ask for their help. I know I have launched/retrieved many boats for people with motor homes that did not want to break camp to pull their boat off the lake.