My BT combat pants have knee pockets that fit "Chompy" in no bother...
I usually keep socked up on the walk from the own gunner's area (I play at NPF) to the field we're playing and if I get out or at the end of the game re-attach the sock straight away.
I can fit him around my marker sometimes too, I have an Azodin with a reg so the bungee cord goes around the frame and his butt sits nicely on the reg.