Just got back from kelso. Good times, but unless you just want to ride up and down the hill there's not much in the way of hills. There could also be more trails for 7 bucks.
The "x-treme" trail is pretty fun though.

Also, to re-hash the carbon mtb argument, I fell on some rocks today and the seat tube landed on a rock with all of my weight on it. If it had been carbon I'd have had a very expensive and upsetting walk back to the bottom of the hill.