Hi just come across this forum but might have some interesting stuff for you, I am a marshall for powerplay paintball at brighouse they also have a site at wakefield both do walk on days. also i play as walk on. last played at dangerzone on 7th may its a good site and will be there on the next one.
I use a smartparts ion with an air system and power feed hoper so for anybody wanting a good marker i can recomend this as the marker costs 150 quid and will fire up to 17 shots per second, the only downside is you use a lot of paint but the grin factor is well worth the extra paint
Also have played at site in doncaster bawtry paintball fields this site is a bit more expensive but you can take your own paint and is well worth the trip. The walk on days are 25 quid and the next one is 18th june.
As for the paint i use proto from planeteclipse.com they are in manchester check out the web site