If there is frost on a course that has actively growing grass, you can't play because it will pretty much kill the grass where ever people step with thier feet. As for dry and cold, I don't know, we rarely get pure freeze delays, but it happens every so often. Our problem is with overseeded fairways and cool season grasses on the greens that never really go dormant. Those grasses will be torn up really bad if they are walked on when frozen/frosted. If the entire course is dormant, as I would assume happens in Utah, I suppose play is ok, but here, when its freezing, golf is not happening.