I would like to reiterate the above point, there is a huge safety aspect of the game and from marshalling games I know how stupid people can be.i really would suggest using a properly set up, insured and maintained site.
the fact that you're asking these questions tells anyone who knows the answers that you are highly likely to either hurt yourselves or god forbid some poor rambler.
Ramblers tend to ignore everything thats good for them and i have even seen those everest prepared hero's walk straight through the middle of a game zone!
please think about this carefully!
roy
You cannot guarentee anywhere is safe from ramblers however a properly run site will have taken every precaution they can.
The questions you asked show me you are not experienced enough to know the safety protocols and if anything did happened not only would you be faced with a court case but you would also put the game in a bad light which really isn't a good thing considering the current situation of paintball as a sport.