Planning first roadtrip. Help!?

A few tips. In Hershey, stay in the Hershey Hotel, not cheap, but it's your honeymoon and you might as well. Don't underestimate northeastern traffic, it's heavy. Always. Even if you weren't planning on spending an overnight in each of the northeastern cities, with the possible exception of Providence, it would be worthwhile to do so. In Philly, eat at the City Tavern, do the historical tour of the area, don't skip seeing Independence Hall and Christ Church. Amish country sits between Hershey and Philly, may be worth driving through if you have time to take the scenic route. Take a few minutes to just stand in the middle of Times Square and admire the mayhem. Get tickets for the Gateway Arch ahead of time, likewise if you're seeing a play on Broadway. Have fun!