Get the onXmaps app to find access to public land and do the homework on the state sites. Obviously Wyoming is your best bet. If you are looking for a non-trophy pronghorn to "check the box" you can probably find one in most units if you put in the time and legwork. Later in the season usually has calmer game than the opener but many of the "trophy" bucks are gone. In the easy draw units the game often heads straight for private land when the season opens.
If you strike out on your license make sure you buy the preference point to help in the future.