Should Members of a Club Sponsoring a Car Show Be Eligible for Awards

Our Inland Mopars Car Club puts on an annual all-Mopar car and truck show. Our club members do the bulk of the judging (we also have some volunteer judges help from other SoCal Mopar car clubs. They are not allowed to judge the class that their vehicle is in.)
Judging is done by a pair of judges per class. Each judges all of the cars in their assigned class, then their individual scores are averaged together.
We've always had a hard rule that Inland Mopars club cars are not eligible for any individual awards. Our show is a charity-benefit show so we ask the charity to pick two of our club cars as their favorites and we give an award to each of those noting they are "charity choice".
These practices work for our show and are appreciated by participants who have paid to enter, knowing that the host club cannot win any of the individual show awards.