We used to do the same with motorcycles trials, you would turn up at the start & they would give you a sheet of paper with an address (well a description of an address) of where the stages were & roughly what time they expected riders to be there. You then got out the map & plotted a route, you could then follow a few riders all the way around, or sit & watch them all come through a stage then jump ahead a few to catch them all again. No fees at all as I remember, or might have been 20p for the map.