T is correct -- unsanctioned events usually use "celebrity" judges (mayor, fire chief, etc.). Suggestion: Give your cooks requirements on what they are to cook (e.g. ribs, chicken, etc.) and how much to prepare and how to turn it in. Blind judging isn't necessary unless you want to add the complication of it. Give your judges the criteria and scoring method -- for example, appearance and taste on a scale of zero to ten, ten high. This way it stays simple but there is at least something to guid folks and aim for.
Hub