I'm co-owner of Arkansas Rivervalley Paintball. I could literally send you pictures via phone, so you can get a serious idea for the best design for the air system.
We have our compressor on the back left of the trailer, with a hole in the bottom of floor, (covered by a rotating cap), which we run the line through, and have our table set outside of the trailer, where we run on Vmax proboxs (best in market) running 3k and 4500 fills.
We have used time to perfect this system, and it works for us.
Feel free to contact me via txt by 1-479-670-2211 for other help on the mobile trailer field idea. Cause I've already been there and done that