Pros:
Paul B. Johnson's Desert Fox defines itself through its well-integrated, challenging water hazards. The park's huge lake factors in in a variety of ways, bordering fairways, backing pins, forcing water carry, and emphasizing precision placement. Peninsula greens, either formed naturally by water or through a combination of water and OB, create some significant scoring separation, yet the layout still affords many opportunities to play it safe if you're mostly worried about staying dry during a casual round. This is probably the best set of water hazards I've played outside of Selah Ranch.
The tree cover at PBJ DF is at a happy medium: every hole gives you an obstacle to think about beyond the hazards that are challenging placement. The incorporation of trees meshes well with the rest of the design, lending a technical nature without being tight. There are a few spots where things tighten up and move away from the water on the back 9, and while some of these are the course's weakest holes, the change of pace is still a welcome one.
Elevation is rare, but what is present is used well, with downhill shots on 1 and 3 (intensified by the bordering water), and 2's slight uphill shot through a tight window.
Two sets of tees do a good job of tweaking the challenge factor and providing multiple looks to the same hole.
The park is easy to find, has ample amenities, and offers an additional 9 in the form of Little Fox, which plays differently enough to Desert Fox (longer, more technical obstacles) to provide a nice complement.
Cons:
Desert Fox shows its age a bit, both in its rusting baskets and its exclusively par 3 layout. Each hole focuses on making a single shot, with rarely a need to chain shots together.
The course loses a lot of bite when it strays away from the water. Without the threat of a lost disc or a penalty stroke, it reverts to a pretty standard, semi-open and flat public park course. Even with the threat of water, there's enough openness on many holes to lessen the pressure on line shaping: hyzers of your preference of backhand or forehand often suffice. Desert Fox's emphasis is really about hitting the proper landing zone, through its natural and manmade OB, and while this aspect of the course is an enjoyable one, it's a narrow focus that didn't carry my interest from 1 to 18.
While grooming seems good, the course seems to have seen better days. In addition to the aforementioned aging baskets, the natural tees can sometimes be rough, and tee signs aren't always present or obvious.
Navigation gets a bit gnarly at a few points, even with the map.
Other Thoughts:
Desert Fox was a fun course that becomes a worthwhile stop when considered alongside the longer, more wooded and technical (and for the most part drier) Little Fox. It's also only a short drive from Ashe Lake, making it easy to hit all three. I personally preferred the more wooded confines at Ashe Lake, but PBJ makes for the better pair of courses considering Ashe Lake 9's novice focus. I'd say hit Ashe Lake if you only have time for a single 18, and hit PBJ if you only want to make one stop but can take in all 27 on site here. But hopefully you can get the best of all worlds and hit both stops while visiting the Hattiesburg area!