Messages

I've never gone to a convention before, so I'm kind of confused of how things work out. I was going to pre-register, but was a little late to do so, meaning I'm going to have to go through "On-Site Registration." Let's say a friend of mine and I are going to be going by ourselves on Saturday, the second day of the con... Would we be able to purchase only a full weekend membership even if we are a day late? Or will we have to purchase a single-day membership for each day we will be going (Saturday, Sunday, and Monday)?