Instead of armbands, with rubber bands which don't fit, cut off circulation, fall off, etc. Breed specific trophies, such as highest scoring Briard, are fun. And it gives something extra to compete for. If you have them on the first day of a 2 day trial, lots of people stick around to see them awarded. Have fresh water availble for dogs and handlers, especially during summer events.
Water is cheap and refreshing.
Often only softdrinks or sugared drinks are available for handlers, and although exhibitors usually try to bring water from home, more is usually needed than they can carry with them, especially on weekends. This is also extra nice. In a two or three day event, offering a nice picnic dinner or BBQ on the first night allows show help and competitors a time to socialize if they want to. Problems at Trials. Running, Score-keeping Running, Smooth Trial.