Really ... your compass was warning you about something, whether you could see it or not.
Your compass never needs recalibrating.
It sounds like you might benefit from a refresher on the drone's compass, and what calibration actually does.
Read...
Dronedeploy is very good and there are other well-regarded products too.
Most are free to use for planning, flying and acquiring images.
You only have to pay if you use them to create orthophotos etc.
There's a lot of windows missing so yes other animals would get in pretty easily. Most of central Scotland was littered with shale bings in the past 100 years due to coal mining. There was a huge one in the village next to me and it was just...
WebODM works great for mapping and can handle a lot of images. It is also free. I use it a lot for my projects (see my recent post about it).
As you have a Mavic 2 drone, it works with Litchi, which is a perfect low-cost drone flight package for...
I have been using my IR-modified Mavic 2 Pro to do vegetation monitoring on a local National Forest (US). I did the IR conversion myself using Kolarivision directions, which was very easy! I used their IR Chrome filter to produce false color...