The flip side is if all new folks manage to sign up and nobody wants to lead then it limits the number of registrations. Letting prior trail leaders sign up first (who likely will volunteer again) should encourage others to lead this year or in the future in order to get that priority. IMO anything that incentivizes people to lead trails should be encouraged.
Also not to be rude to new folks who want to come, but part of what keeps me coming back is being able to catch up with people I know. There are plenty of people in the forum who I’d love to meet and I do hope lots of new people can register, but I’m not sure I’d come (and volunteer to lead) if it was all new people.
Either way some sort of staged registration is really needed, given how overwhelmed registration seems to be each year. (FWIW I really liked the Cruise Moab system that puts everyone who connects up to 30 min before the event into a queue, and then randomizes everyone when the registration opens. It’s similar to how the Canada national park camping reservations work, which BTW is waaaay better than the US model).
Quite literally chicken and egg problem!