I don't think I feel "hemmed in." There's definitely more dodging around people, especially on a nice day. I don't mind that. I tend to be a pretty slow biker anyway, so the slower pace of riding on the MUPs does not bother me. What does bother me, or has in the past, is using the MUPs in urban areas after dark. Because our MUPs are technically part of the park system, they are also technically off limits after dark, but they are also very convenient for avoiding some high traffic, high speed roadways that would otherwise be required to get me where I'm going. It used to concern me that I might run into someone with ill intentions, but I eventually reasoned that I didn't know of any random incidents of violence on our MUPs, but was I was arware of a few bicycle-car collisions, so statistically it seems like it'd be safer on the MUPs than on the streets. Now the part of MUP riding that makes me nervous is the bats that dip into my headlight beam. I am relatively comfortable on most streets, and my daily commute doesn't use the MUPs at all, but when they're going my way, I generally opt for them rather than riding on the roads.