I stocked a few trout over the years. My experiences are mostly limited to float stocking Loyalhanna with Forbes Trail TU. Yes plenty of guys waiting at the popular holes, but we never lacked enough help to get the fish from the truck into the boxes and raft.
And the raft was key, because those deep holes, I'd just hang off the side of the raft and float thru them. Dunno if we used life jackets or not but technically that would be required.
One year, I recall, FTTU sold stocking buttons to pay for supplemental fish. (Loyalhanna is a typical put and take fishery, with DHAFLO section) Our then President float stocked with me, and sold buttons to the guys as we passed by.
"Want this big rainbow in your hole? $3.00 for a button, I can make that happen." LOL
There's always going to be guys who just line up waiting for their fish. You won't change that with dirty looks, ball busting, or a 2x4. They were raised to not think of anyone but themselves. Its probably best to try and not get worked up over it, you're the only one whos suffer for it. They're sort of like those kayakers, they just don't give a damn.