First, the camp grounds in the Canyonlands fill up by noon in the spring and fall. Summers in the Canyonlands are brutally hot. Park rangers told me that temperatures on the White Rim Trail reach 135 degrees in the dead of summer. Rain will turn the trails in this area to mud that is like grease and will clog all but the most aggressive tire treads. Finally, spring and fall are prime months in Moab and hotels fill up quickly.
Adventure touring in Utah is almost limitless with rides for every skill level.
Be sure to obey all park rules and yield to horseback riders and mountain bike riders. Courtesy will go along ways to help keeping areas such as Canyonlands open to all responsible users.