Just stayed at Lake Skinner near Temecula, CA. Woke up in the morning and the whole inside of the Mother Ship was crawling with ants. DW was totally freaked. She wants a professional exterminator...
Some of the parks that do not let you use chemicals will allow you to use comet cleaner or diatomaceous sand, the one used in swimming pool filters or you can ask them to take care of the ants themselfs, then they will use Home Defense for you.