Just show up at the Summit anyways. You can go on the trails; always other groups of people going out on trails. You can still buy raffle tickets for the big give away. You can still hang around the hotel area and see all the cool FJ's and hang out.
Don't do that, that's a terrible idea and here's why. As organizers of the event, we make deals with the city, the forest service, the hotel, and our insurance company about who will be where and how many people there will be at the event. The second year we didn't limit the number of registrants and we had far too many people. Ask anyone at year #2, we ran out of food, the trail runs were a mess and it ruined the otherwise amazing experience for a lot of people (including the organizers).
We have limits now for this reason. We are not allowed to have over a certain number of people on the trails, so if we break that the forest service can pull our permit. If someone not registered does something stupid around the home base of the FJSummit and hurts themselves or someone else, what do we do about our event insurance?
I know it seems like a funny idea to just crash the event, but think about someone else before yourself for just a second. Putting on a huge event like this is not easy, and we do our best to make it great for everyone. This includes limiting the number of people. We truly wish everyone could come, and up until this year we have never had a problem with selling out the event. Now that it has happened we'll think about what we can do for next year, but for now we have to play with the cards we were dealt. As organizers we hate the idea of turning people away, we truly do, but it is best for the entire event in this case.
My plead is with those people who won't be able to show up. We get cancellations each year, but lots of times we just have people not show up without telling us, so for those people, please tell us so we can transfer your registration slot to someone else who wants to go.