Normally, I use a "Friction Holster" so as the shorts drop, it gets set holster and all into the crotch. Not visible from outside the stall, highly available. When I use a hard IWB holster, I normally wear "fat man jeans" which are the stretchy type. I can loosen up my NexBelt (ratcheting gun belt) keeping the pants buttoned and zipped and slip them down. Pushing slightly outward with ones legs keeps the holster in place and easily controllable/accessible.