I called WYGF to find out if they have pdf maps for mobile devices other than the Garmin GPS units. They directed me to huntinggpsmaps.com

Apparently huntinggpsmaps.com has had maps for download to iPhones and iPads for awhile that show topo and aerial views and private land with ownership info. The GPS in the mobile device works without cell service to still show your location on the maps.

They recently came out with a Droid version but looking at the reviews it is supposedly slow and buggy and really drains your phone's battery.

It would be great to have an app on your phone work as well as your GPS without having to carry a Garmin in addition to your phone.

Has anyone tried the iPhone version?