Well it's still an unsolved problem to a degree, but it has taken a back seat to 2 larger issues.
I live in the geographic center of one of the US's largest metropolitan areas.
I hunt squirrels. Parks are ok, but unless it's nice and chilly they tend to have lots of pesky people ready to watch Bambi the Tree Rat get a very tight handshake. Also college campuses, but that has the same problem if not hunted on a weekend.
I would like to ask golf courses, but I have zero idea how to approach that, and I don't think any other falconers I know know either.
I've got places a couple hours out, but good luck doing that during the week.
Tbqh famalam I might ought to get like an aplomado and carhawk grackles.
I ain't doing real microhawking with a kestrel. Weight control of that scares the shit out of me.
Easiest way to get landowner contact info is to already know people. Second easiest is online GIS websites, which take a little toying with to figure out. Turns out Cheasapeake owns half of the land in the area, and the other half is owned by some investment firm in downtown that probably wouldn't even answer the door if I knocked. The GIS was more useful for landfinding at the field meet spot. Even then, it's still kinda spotty. Best best way to net people you don't already know is to knock on doors with your bird in the car / show them the bird somehow. This is, suffice it to say, difficult for a preapprentice.
If you're lucky and know people you're probably already set. If not... good fucking luck mang.