When I was little my best friend and her family would always go on etheir vacations in their RV - there was 8 of them - 6 kids and her mom and dad and you really needed that RV to travel on their vacations - and they ranged in ages from 14 to 2 - so there were car seats which just take up a lot of room to begin with. You can get really nice new or used RV’s and Motorhomes that would be great for any vacation. There is nothing like traveling from place to place when you are on your vacation. Or get a nice motorhome or RV and travel the country with your spouse. That is actually what one of my co-workers did when they retired.