Flies!
This is generally a great spot. Beautiful country and always seems to be plenty of availability.
This time (late June) the flies were so bad we had to pack up and leave. Even hiking the San Juan trail we had hundreds of flies around us. Back at camp they were so thick that we figured we’d rather go home than be swarmed with flies or stuck in the tent all day. Must just be a seasonal thing because I’ve never seen them this bad in years of camping.