I am new to this site and would appreciate any help anyone can give with our roadtrip from Peoria IL to Washington DC in mid June, with a 35' travel trailer and 2 children aged 5 and 7. We will have 8 days total and the rough plan is to take the route suggested by Google maps ie I-74 E, I-70 E. Our aim is to get there asap and then we can take our time seeing things there and on the way back. On the first day we aim to drive to Cambridge OH and stay at a campsite near there, driving the next day straight to Cherry Hill campsite in the Silver Spring/College Park area of Washington DC. We will then spend 2-3 days exploring DC, probably taking one of the tour buses that you can get on and off. Any suggestions on what museums children of 5 and 7 would enjoy would be appreciated, also any other tips on being in DC with children of this age. My husband would like to see the Liberty Bell and Declaration of Independence while we are in that part of the country so we plan to perhaps spend 1-2 days in Philadelphia area. Can anyone recommend a decent safe campsite in that area, one that we would be able to travel from easily into the city using public transport? Again, any suggestions as to what to do there with young children would be appreciated. We would then journey back and would be interested in ideas of what to see on route back. I appreciate scenery and countryside, my husband is interested in history - not any specific period, just history generally. We are considering visiting Gettysburg.
Thanks in advance for any help.