Thanks everyone for your thoughts! Keep the ideas coming :) we would need a separate space for our daughter in the evening so that we don't have to do lights out for everyone at 7:30 pm... So a separate bedroom area is a must. We have a car that can tow 5000lbs but would be open to getting something larger as the car is getting old. And we would rather get a larger car than something small to tow behind an RV.
We would be staying at various locations for 2-5 days.
Another question: how long (approximately) does it take to back in and set up a TT vs a Class A motorbike once arriving at a site?