When I went over with riding, we went to NYC, Washington DC, Had about 4 hours in LA, and saw a fair bit of Maryland and Virginia.
Ohhhh yep, definately want to go have a look around in Kentucky - Horse heaven :]
Is RI actually an island? Is that a silly question? Lol! Would love to come visit! And yep, riding in central park is definately on the to-do list. When we went last time we went for a carriage ride, but actual riding would beat that hands down :]
We will probably do a very touristy tour of Hollywood, and the obligatory photo in front of the big letters - What would a US trip be without that, lol!
Glad to hear it will be easy to get into Canada. Maybe we will spend a few weeks in the US, then the last week or so in Canada and then fly home from there. Will have to check out what is the cheapest!