You can create a GPX file to move pushpins between the hunting grounds.

1. Log into and select Hunting grounds
2. Select the hunting ground from which you would like to export passes in the left-hand menu. 
3. Click Import/export in the left-hand menu and click Export as GPX.
4. Save the file on your PC.
5. Next, open the hunting ground to which you would like to import the pushpins in the left-hand menu.
6. Click Import from GPX and select the GPX file on your PC.