We are a family of four with two kids aged 11 to 8. This summer we are planning to take a road trip from San Francisco to East Coast. In the East Coast we want to visit Washington D.C., New York, and Niagara Falls to name a few places. If the recommended route is I-10, we would not mind covering Florida as well. Our preference is to travel by road from West to East and then fly back so that we can make this a relaxing trip without rushing. We do understand the plan might make the trip a bit expensive with one way van rental and air tickets.
1) Which route should we take? I-10, I-50, ???
2) Depending on the route, what are the must see attraction. We like outdoors.
3) Any other suggestions on things to pack or take care of.
Thanks in advance for all your help.