I want to be involved in rp15 as a helper and thus won’t be buying an Early Bird Ticket. Am I guaranteed in getting a spot on the helper team?

Up until now we have never had to reject anyone who has applied to be a re:publica helper. However, if more helpers apply this time than we need it may well be the case that we will have to reject a few applicants. If you do not want to run that risk, purchase a ticket now and sell it on later.