Towing a travel trailer with a truck camper?

You can do it, but as you described your preferences, you may want to go bigger camper and smaller trailer. If you get a truck camper that has all of the living amenities then when it is just you and your wife, you can camp comfortably and tow your boat. When you have the kids, you can tow a teardrop or Tab trailer. If you choose a teardrop, then you and your wife have a comfortable bed.

I also like the cargo trailer idea. You can easily convert it into a comfortable bedroom but also use for other towing applications.

Edit: Perhaps you did not say you had a boat, but if you did, this way you could tow it.