The travel warning focuses on terrorist activities targeted at westerners. It advises US citizens in Sudan to have their own contingency plans to depart the country independent of the US Embassy. Again, hunters planning a trip to this destination should speak to their operator about security plans. Ask about the security if you're scheduled to stay in a hotel. You should be escorted when in public and travel straight to your hunting destination. Stay away from areas that attract attention and keep inconspicuous.
For legal reasons, The Hunting Report cannot recommend you ignore a warning by the US State Department. Such things are not issued in a vacuum or for strictly political reasons. Also, some insurance policies (health, life insurance, etc.) and work contracts may be nullified if you travel to a redlined country. Check your policies and contracts for such language. You should also prepare your own backup plans, including carrying a satellite phone (which The Hunting Report can provide) with the emergency numbers for the US Embassy.