Well it took awhile but I did try blowing air around everything and it didn't change a thing. Tthe other appliances (stove, water heater) have roaring flames so I know it's not an issue of how much propane is coming out of the tank. There's no crimp in the line at least in the fridge as ours is a hard line, so there's no bend.
I put it away for the season and will maybe give it another look-see in the spring. Who knows, maybe it'll 'fix' itself between now and then. If anything, the fridge runs fine on electricity and seems to hold the coldness well, so if we don't have the fridge running during our travel (which is usually no more than 4-5 hours), maybe we can survive without it.