Hi, I'm going cross country. FLagstaff to Kalamazoo, without any freeways. I have 4 days, so no big rush. I don't know if I should make hotel/motel reservations in advance, or just pull into one every night. I'd rather not make the reservations, so I can stop when I feel the need, but I don't want to have to spend too much time searching for a place, either. What's your opinion/experience?