<<I add in my signs (with the award won, date, show logo, etc.) only AFTER the exhibitor has ordered their product(s). It's the only control we have over the owners who think it's OK to shoot their dog over the OP's head/shoulder>>

I think thats probably the best overall solution, for as long as the KC is only permitting the OP to use their logo.
Was at a show last weekend, and was too busy talking ringside to even check out the photographer, to see what type of set up they had.
Look forward to hearing/learning more! Thanks Jim!