First step is to protect the plane. Friends went to a sheet metal shop, and had 3 foot long strips made a foot wide, with a standard slide in joint at one end. These are assembled around each wheel, so the critters cannot get to the wheels and climb into the plane. Cheap, positive insurance for the largest risk. Most insects will walk around the metal, rather than climbing, as they do with tires. In severe weather, they will eat the insulation off wiring, both 120 AC, and 12 DC.
Small dishes of permanent antifreeze will not evaporate, and will poison whatever critters invade your premises, They like the flavor.
No experience with the electronics, but have heard the do not work. It is a waste of time to ask the neighbors to quit eating as they work, but if you donate a trash container with a metal lid, they may use it.