Note to juniors:
Roland Greene won the Canadian Tire Sprint Series as a junior. Google booth and you will see that this was no small feat. He also went on to win some rainbow stripes but that's a story for another day on the riverbank.
As to wether or not to show up for a ride there has been some good advice in this thread like "talk to the loud guy" and introduce yourself to someone. The best advice has been just to show up which is an unusual consensus in the 41.