Thanks everybody for the replies that's great.
NZCaver has put me in contact with a guy who is trying to get me on a trip which is awesome! thanks NZ!
Steven I have replied to your PM. But for now I'll go with the contact NZ gave me. Thanks all the same
Bruce thanks for the offer
Yosemite sounds good! I was hoping to get around using public transport but we'll see what happens (I you see someone in a hire car driving down the wrong side of the road trying to change gears with the other hand give a honk it's probably me
The national parks sound just my thing. Winchester mansion sounds like fun I might have to look it up.
My preferances for caving? well I love vertical (as most who watch the "OnRope" section could testify) but basically I thought it would be great fun to go caving whilst I was over there so if I get underground I'll be over the moon. (pun unintended)