I have been hunting and arranging hunts in Zim since 1996. We have never had an issue with getting trophies out or with clients taking thier desired trophies. As has been mentioned earlier it is essential that you book with one of the reputable outfitters in Zim. I spend one two three months each season in Zim and still think it still offers great value for the abundance and quality of game. You mentioned Gemsbuck and Mt. Zebra which are not available on quota in Zim. There are several areas that have been taken over by nefarious characters, some of which are on the sactions list. Bubye Conservancy is a great option with plenty of buff and plains game. The Save Valley is known for its abundance of plain game and ample supply of buff. The Bubye books up far in advance. The Save has come under some pressure this year with government officials siezing many of the hunting areas within the Save. The Matetsi area is very good for both buff and plains game but not every unit in the Matetsi should be considered. The Omay is very good as well.
