Even though our kids are grown, they do travel with us often, so our traveling setup ended up being a big van with a TT behind it for much of the same reasons you mentioned. We went with a Nissan NV 3500 HD.
Take out the extra seats and there it ton of room for 6 adults without piling stuff up over the windows like we used to do in a Suburban or the Tahoe. And it's actualy easier to get in and out of for every one. The towing rating was the same or better than many SUV's and I like having a closed vehicle for security (don't like roof top luggage racks or open pickup truck beds when traveling).
