Probably a good idea to try and get some tentative numbers together and see who and how many want to camp to get an idea of how large an area would be needed. If only a handful, not a big deal but if you looking at 30-40 people wanting to sleep in hot sweaty tents you may need to have someone reserve some area. I like the idea of having a staging/rest are but nothing interests me less than camping in 80+ deg weather after a day or two of paintball. Joliet is a decent sized place Nd has a lot of hotels within 10 minutes of the field.