The reason for the "no walkons" rule is mostly because we usually don't have room for any at the beginning. There's a limit to how many people can be in the arena at one time, and in "Hostile Shores", we had to ask all of our walkons to leave so that the registered players could get into the arena. All in all, we just think that if we're going to put this much time into planning this scenario for you guys, the least you can do is get organized and pre-register. It makes it much easier to run a scenario when everyone pre-registers, without walkons. Our previous scenarios have always been heavily populated on the first frame, then the numbers taper down after that. When this happened, we would start using walkons in the later frames. With the new format of holding the event on only two days, we're hoping to reduce the amount of no-shows, so that walkons are not needed in the last two frames.