If I were to wear a ghillie flight suit when I play paintball, and I use a co2 remote...what would hold the tank? This is what I think would be the most practical;
-Wear the flight suit on bottom
-put on my RAP4 vest for the tank/ammunition
-Put a peace of nylon, or just cloth over the rear of vest to protect the velcro,buttons, and zippers on the vest from snagging
-put on top of all that a kind of "cap" or stalker ghillie type thing.
I'm not a paintballer, I used to be however and when I used a remote for my co2 tank I, depending on the size of the tank, would put it in the "tube holders" that you can buy at any local store that sells paintball equipment. Normally the 9-12oz tanks fit fine in them, I haven't tried to fit anything larger. If you arent familiar with the tube holders or whatever they call them these days, it's the black nylon harness that has 3 pouches on it for 200 round tubes. Hope this helps!
Most paintballers such as myself cant help you because the impracticality of wearing a ghillie suit in paintball isnt worth the limited benefits. I suppose the limiting factor would be the size of your CO2 tank. If your using one of those dinky 9-12OZ ones you can wear your flightsuit, put camel back on and replace the water bottle with the CO2 canister, cut a smile whole towards the bottom for the remote line and you have a fairly low profile remote line holder that a ghillie net can be put over. Wont need to carry extra ammo becuase if the 200 rounds in your gun hopper aint enough, you're not being a sniper anyway.
5 years ago, before I discovered airsoft, I was a misfit among the paintball clown (in my erea, they are all clowns).
I carried my 20oz tank in my webbin in the large pouch that ride low on your back.
As for playing with a ghillie suit, it can go over it no problem, you probably will have to make a hole to let your remote line exit to the side if you are using a jump suit as a base for your ghillie.
In airsoft, I still use the very same webbing, but I carry more usefull thin in it like mags, maps, water...
Don't play with a ghillie suit for paintball, you will look like a messy wooky if you get shot too many time. Your gun don't have the range and precision to make the ghillie usefull anyway.