Keith,
I might have got you confused on the camera WiFi. Although, you can connect to the camera with WiFi, it is not advised to leave the camera's WiFi on while you are flying. It will interfere with the communications with your bird. I just thought that you may have inadvertently left it on. So, do not leave the camera's WiFi on when you are flying!
The FatShark DVR works pretty good and the files that it generates are lower quality so they don't take up a lot of disk space. A 16-32gb SD card will hold a lot of files/flights.
Jerry
