I have been a member at Wilmington for about 10 years and I have always enjoyed both courses. I think the North is very underrated and the scoring in the medal play last weekend showed that it can play very tough, even at 6500 yards. As for the South, I agree that it could use some tree removal in places, but I also think that some of the claustrophobic spots are important to the play of the holes. Notably, the 2nd shots on #3 and #16 can make the holes. On most par 5s, the layup shot is sort of meaningless, other than maybe wanting to favor one side of the fairway. On 3 and 16, however, it is down right terrifying. They both are long enough to require a long iron or wood for the layup, but both get so tight at the landing area that is easy to put yourself in jail. The trees require a good, accurate shot in those spots and I think it makes the holes more interesting. The same argument could me made for the tee shot on #11, although here I think the trees are a little too overwhelming. On the rest of the course, I do not find the trees to be much of a factor, so I am not sure how much removal is really necessary.
Unfortunately for Wilmington, the length of today's players has made a lot of the fairway bunkering obsolete. As with a lot of RTJ courses, the primary hazard off of most tees is a bunker (or pair of bunkers) pinching the fairway at about 260. These days, many of those hazards are out of play for long hitters. The longer hitters that I have played with knock it right over the fairway bunkers on 1, 2, 5, 8, 12, 14, 15 and 18 (although 18 is a little tougher). Unfortunately, they all still come into play just fine for me.