Things you should have at the OP
Each person should bring a time piece, it will be needed.
Death Rag, and if possible things to be used as bandages for wound shots
Printing a map from www.airsoftpdx.com would be a good idea. As well as having a compass with you too.
Teams should have someone with extra pouches or bag. Each team will have 2-3 Medics on the team. The medics will be carrying certain materials. So it is wise to bring something to carry this stuff in.