For teh mud daubers, I have had really good service from the Hot Shot hanging strips (http://www.amazon.com/Hot-Shot-5580-Unscented-Repellent/dp/B0019BK8AG) They hang in the cabin when I am not there and are in the cockpit lockers and lazarette.. The paper wasps that are in the sail, under the sail cover are always a little surprise when ya put the main up after a period of idle time.. I try to close the companionway and get folks out of the cockpit when I remove the cover and hoist the main.