Thanks for the reply.

I would definately prefer the DIY option. I'm pretty confident that with some input, we can find a route with enough activities.
Probably hotels is my big unknown. I have no idea of what my hotel options are in the US. My only visits previously have been to big cities (New York and Chicago), and obviously travelling on a budget, this is one area I would like to have some freedom on, while keeping costs low (the classic balancing act)..

Will do some more reading up on here, but if anyone has any tips for good chains to keep an eye on, then all info is welcome

Cheers
Nigel