Do I need that "route sheet holder" for your handlebars and if so where would I get one? It sounds like you just ride like crazy, then chill and wait right before your checkpoint...does that make sense?
I think I might go just for a trail ride, even if I'm not even close to competitive.
Like highgear said you don't really need the route chart holder but you will learn faster/easier how to keep time and track of your miles/resets. You can just go ride and you may do well. Remember... "It's not a race, it's a timekeeping event"
As far as wher to get a route sheet holder... any Parts Ulimited dealer should be able to get you one in a few days. I boughtthe larger "Dual Sport" version by Moose Racing. You can always put a smaller sheet in the larger holder.