I'm planning a 20 day tour, 10 of which will be all on gravel and dirt roads through mostly remote wilderness without any re-supply options, but water supply is not a problem. I will be using an older model mountain bike with solid frame, seat suspension post, handle bar suspension, up-graded gearing with heavy duty axles, 32 DT Swiss spoke 26" wheels with 26 x 1.9 Kevlar wrapped tires, rugged front and rear racks and 4 panniers. Total weight including rider, provisions, and gear will be approximately 255-260 lbs. I have used this bike and set-up for similar rides, but with 15-20 lbs. less. I welcome any constructive comments and/or opinions and suggestions. I really don't want to use a trailer unless the weight is too much of a concern. I have the bike set up for a 2-wheeled trailer, and have used one to haul heavy camps into remote areas, but 2-wheeled trailers are an extra drag and worry, especially if the roads are rough with deep pot-holes and protruding rocks and are rarely maintained or used.