I had an incident with mud daubers myself---the family and I were leaving SC in July to go on a two week trip to Arizona. And of course we were taking the southern route, the hottest, and about thirty minutes after starting the trip the generator kicked off turning off the AC units.Well the gen would not restart for about 30 minutes and would then only run for about 15 minutes. This went on for about 300 miles until I stopped for fuel. Needless to say it got hotter and hotter in the MH. Well I got really lucky when I stopped for fuel, I was at a quite station and as I started unscrewing the fuel cap I heard a big whiish and I thought---gee I've never heard that before! We traveled on down the road and the gen kept turning off and I got to thinking about that whiish, so I stopped at he next rest area and crawled under the MH's fuel tank and low and behold there was the fuel tank vent line hanging down and FULL OF MUD!! I stuck a straw up into the vent dislodging the mud and bugs. Presto, no more gen turning off, AC on the rest of the trip. The moral to the story is to install bug ingress inhibitors in all round orifices of about 1/4" or less in diameter. I installed a pneumatic muffler in my fuel line.