I unplugged the dryer, plugged it back in, still nothing.
I unplugged the dryer, shimmy-ed it out a bit, tried to get the front panel off (felt like it should come right off, but it didn't), moved it out some more and looked at the back to see if that was easier (not), shimmy-ed it back into place, plugged it back in...
It worked! I'm thinking there's a loose wire or connector (ALWAYS check for loose connectors first, that's John's first rule). But I don't really care, it's working now and I've got the important loads done for camp.
And JC's home, just fine. All my chicks safe in the nest.