My biggest gripe is that I have to pay a fee for what is probably the lowest impact form of recreation there is. The fee is supposedly to maintain the trails. They then take those fees and build massive visitor centers (like at Mt. St. Helens) which are, of course, free to visit. So the fee for my low impact use goes to subsidize very high impact sights. That sux.
Oh yeah, and I agree. Cantwell didn't say shit in her canned response. Like Glen said "tell them what they told you, empathize, support... do nothing."