Cell reception is on the weak side in Lyons for all carriers, so even if you get it, its going to drain your battery quick if no access to electric.
I'll just throw out an idea for PB and suggest they go the route of several airlines now- charge a few bucks a day for wifi access. This might allow them to fund opening the bandwith for their wifi setup, and make a few bucks as well. I know some will say that we should be listening and dancing, not playing with our phones. But it might open up some interesting social networking things at the fests to increase sharing of photos, etc.