OK, last piece of advice. Get something YOU can drive too. Nothing worse than only having your husband be able to drive. If he gets sick or hurt you will be screwed.
Plus, as a family, you will sometimes need to cover a long distance quickly - think NY to FL to see Disney. By having both my husband and I drive, we are able to cover larger distances and it allows us to show our son more of this country. We did a 3 week, 6,000 mile roadtrip with the truck camper a few years ago. We covered 21 states in 19 days LOL. Did we do it "justice" - nope. But we did get to see what Nebraska looks like from the interstate... and dodge a tornado to boot LOL. We traveled a northern route on the way west and a southern route on the way home. Sure we only breezed through some states, but it was better than never seeing them at all to us. And we stopped at enough things along the way to make it memorable for us.
People said we were crazy to do it so fast, but as a young family with only 2 weeks vacation (took an extra week unpaid) we were just never going to be able to "do" it right like older couples can. Did my son miss out on not actually going into the St. Louis Arch (we only saw it from the interstate), maybe... but we read about it and he did get to see it with his own two eyes. And we did stop at Arches National Park, Bryce Canyon, Meteor Crater, Monument Valley, Grand Canyon, Cadillac Ranch, Las Vegas, Glenwood Canyon hot springs in CO, etc. I think we did a good job with the time we had. Enjoy your TT, whatever you choose. You will LOVE the lifestyle. So different from flying and hotels.