Bungles a must. It gets busy overhead during the season. Give the guys at Slingair or Shoal a ring to see what times everyone is heading in to meet the ground tour buses (it's the same for all companies) and avoid that. Otherwise just use your radio and don't be afraid to ask
Try Kalumbaru instead of Truscott. Not sure about the arrangements their but tourists who drive in stay at the mission and they operate the airport so speak to them. Geike Gorge and Windjana Gorge are nice little diversions off the Broome-Halls Creek/Bungles Track.
Cape Leveque is well worth a stop in and either Cygnet Bay Pearl Farm (there is an airport, not sure if private flights can land there) or Willie Creek Pearl Farm (no airport, drive ~30 mins from Broome).
When inbound to Broome from the North (ring the tower before departure if possible) request "coastal to gantheume point then the port, then either join base for 28 or right downwind 10" gives a nice little scenic flight around Broome. The tower can give you more info on how to conduct it.