What should I expect at a tournament?

[the-infidel]

I posted this question over at reddit as well but figured it's best to ask here also. I am playing in my first ever PGA sanctioned Pro Am, me being the Am in that, of course. I am playing at what appears to be a very awesome course in Germany. Since I have never done anything like this of course, what type of things should I expect different from this, and just playing with my buddies. I understand I am not going to win at this and the "have fun" part but are there any other tidbits of wisdom someone more seasoned at something like this could pass on? Thanks in advance!