Slightly difficult in the Group ring, but in the breed ring - ask the steward if you can go on the end of the line! Hard for anyone to crowd you if you are at the end! Stewards are usually quite accommodating if you have a good reason.
Same thing in the Group ring - warn the steward beforehand!
Of course, there are also people who complain bitterly about being crowded when it isn't happening! They like to draw attention to themselves and imply that other exhibitors are doing the "bad things"!!!
Had that happen to me - exhibitor in front hissed at me to leave her room and I hadn't moved yet!!! Boring!!!!!!!!!! I think even the judge was amused at that one!!! Didn't work, I might add!!! LOL