Anyone have any success fishing inside a channel inlet at dead low tide?

Absolutely. You will do better with smaller tackle, however. Think flyrods or small spinning tackle and 5" redfins, etc. Most of the fish will be small, but some will be large and put up a great fight in skinny water with small tackle. The inside of inlets is also a good place to fish during an Easterly blow, when everything outside is too churned up. Deep in the night or early AM is probably best, particularly if the inlet is shallow or there is boat traffic (which continues into the night much later than you'd expect). Now is a good time of year to do it. The ponds are full of peanut bunker and very definitely the bass will come in with the tide under the cover of darkness to have at them.

Deep and swift-bucktails

dead low and some of the incoming has been producing.

caught a keeper on a clam in an inlet at lowtide.
I looked for an eddy and dropped my bait in the middle of it.
it swirled around for quite a while before an oportunistic 31" hit it.

it was tasty meal for my family two days in a row.

yeah definetly hot spots, everyone is tossing lead a 100 yards off the jetties and i got a keeper right behind them in the bay, there were around 20 bass working all areas around the bay entrance during incoming, mostly small.