Hi @Rob, and welcome to GADC.
There quite a number of Mavic Air owners on the forum, so you are amongst good company, and plenty of knowledge to answer any questions you may have, that can be posted on #questions-and-answers . 
If you haven’t already, take a look at the Map of Members. Whilst not every member has added themselves, I’m sure there are other members in your neck of the woods that will come and say Hi that may also have ideas on locations.
(Don’t forget to add yourself to that map : Members’ Location Map - A Guide)
Also, if you’ve not seen it, check out our map of places where members have flown. This doesn’t mean that all these places can still be flown, but hopefully gives you some ideas to pursue.