It is a terrific place to fly. Mainly just make sure you aren't in a national park at takeoff (which is what restricts flying over the volcanos generally) or any other national site that has the same rules. Watch out for airports and military sites. Don't fly over people (be especially careful at beaches). If you are lucky enough to spot a whale from the air (I was not), don't get too close to it. I used Airmap on my last trip there and it served me well.
If you can, I highly recommend you make the trip to the Leilani Estates area if you want to fly near areas impacted by last year's eruption. The main thing to remember in Hawaii is be respectful of the locals and their land. Don't walk on the new lava in the neighborhood itself. There are people's homes under that lava and it is considered disrespectful to cross those properties. It doesn't mean there won't be people out on the new flows, but I'd recommend avoiding them. Fly over them instead! [emoji4]
Have a great trip!