The operation was a success.
I went out and bought a strong magnet from Harbor Freight and attached a 1/4" rope. For a half an hour I played fishy-fishy with the magnet down through the toilet, I used a dowel rod and pushed the magnet as far from the drop hole as I could. I had no contact with the missing fork.
On to plan B, I rounded up several 5 gallon buckets and hooked the discharge hose up and put the loose end in bucket #1 running through a 1" mesh screen. I filled bucket #1, #2, and half way thru bucket #3 I heard a metallic tink and that was the sweetest sound I've heard in a long time. There in the mesh was the kitchen fork. Total elapsed time working maybe 1 1/2 hours, total time planning and worrying 15+ hours
I was very happy to find that the bottom of the tank had almost no build up, I did a super power flush a month ago and I use nothing but enzyme tank treatment - never any of the blue stuff.
I also set up a fan in a window blowing in and everything else closed. This gave the interior of the rv a positive pressure and pushed the smells down the pipe rather than up in my face/nose. But it didn't do anything for the view looking down through the toilet with a super bright led spotlight.
Ducky, you were spot on as usual, the drain was in the bottom with the plastic contoured towards the hole. Thanks