Probably too late to assist, but a "sea story". In one of my M/H, I had a circuit breaker in a bathroom - somehow connected to the GFCI OUTSIDE! On that outside circuit was connected a motion sensor light. Every time the deer tripped the outside motion detector light, the inside bathroom GFCI would trip. After finally determining what was what, I had an electrician rewire the offending circuits correctly. An odd situation I admit, but even pros make mistakes.
'16 JAYCO 154BH SLX, Baja Ed
'13 Silverado 1500LT, 4WD, Ext. Cab, 5.3 ltr.
"Fair Winds and Following Seas"