I got direct authorization to fly at a golf course by calling ATC directly - The golf course is very close to the Carlsbad Airport, which is Class D. I spoke to the airport manager first, who was upset that I called him at all, but his number was listed. Then he gave me the number to ATC, and they said as long as I stayed under 200 FT AGL (same deal though as what I'm seeing above - no "taking off of a tall hill" 200 FT AGL) and flew only at the golf course and called him when my flight operations were over, I would be good.
Then I had to enter that authorization information into my account at DJI, which then sent me a code, which I had to enter into my app to fly. This was early fall 2017, so not sure the update since then, that's the last time. I was glad they were tracking LAANC authorizations so that if some dummy did something stupid they'd know who it was, as my ability to take off was completely locked up until I entered that code.
I stayed under 150 FT AGL just to be safe, all went well, etc.