I'd be suspicious of the transfer switch. They often get cranky and have burned contacts inside. If I had one and it failed I'd eliminate it and go to a manual system.
Update.... Made it to Disney and the transfer switch melted away. This was a recall issue that I thought was taken care of with the dealer. Either way I had a mobil repair guy come and reroute power so shore would work. I now need to go to a dealer and get a new transfer switch installed. Oh and ft. Wilderness was great!
i found out the hard way that you can easily burn out the transfer switch if you dont stop the generator before hooking up to shore power or vice versa. when it happened to me, i got shore power but no generator power. transfer switch changed under warranty and all was well.