Upload & Sell: On
Thanks for the suggestions so far. I'm looking at all of them. Does PocketWizard make anything that would work?
Is there a preference of a radio signal over other ways of communication?
PW offers the FlexTT5, MiniTT1 and AC-3 products that work well with Nikon gear. You would need a MiniTT1 and AC-3 for the camera, and a FlexTT5 for each off-camera flash.
You can probably find used PW's on the Buy/Sell forum at reasonable prices. If you go that route, just be sure you're getting the Nikon versions.
Radio devices, IMO, are the only way to go.