We did this when our 3 kids were ages 13, 10, and 7. It is still the most favorite thing we have done as a family. We spent just over three weeks on a road trip from Texas to Canada. We had just bought a Dodge Grand Caravan and packed it up and hit the road. We spent ALL day on the road the first day because it takes a long time to get out of Texas and into unfamiliar territory. But after that, we went slowly and stopped along the way and saw so many things. A few things we visited: the Air Force Museum in Dayton, Ohio. Lake Erie. Upstate New York, Ithaca & Cornell University, Lake Placid, Watkins Glen & Seneca Lake, Cooperstown & Baseball Hall of Fame, Fort Ticonderoga (we used to live in upstate New York and wanted to show the kids our old stomping grounds). The Adirondacks. Ferry on Lake Champlain. New Hampshire & Vermont. Ben & Jerry's Ice Cream Factory. About a week was spent at the family camp on a small lake in Maine. A day trip up to Quebec City in Canada. Then Bar Harbor and Acadia National Park. On the way back to Texas we took a different route and spent a day at Gettysburg. I think we went through 15 states. The kids were the perfect ages at the time and we did a mixture of fun outdoor stuff, visiting family in Maine and history sites and museums. We packed food in a cooler and stayed at hotels that included breakfast when we were not with family in Maine. I think we spent around $3500. We could have done it more cheaply, but didn't really want to. Your kids might be too young to enjoy historic sights, so maybe save those for when they are older. But we all loved going on that trip and still make jokes that started on it. We might do something similar this summer, since our overseas trip is still postponed. So all that to say, go to the North East because there is so much to do in an area that is so beautiful and the weather is nice. One of the things we all said during that trip is, " It's not HOT!"