I had a good Philadelphia amateur at both those courses one time but that's probably been over 15 years ago now and unfortunately I can just remember the place generally and a few holes but not specifically enough to answer architectural questions. To be honest I don't even know which course is Wilson and which is Jones and I can't even remember which is the north course and which is the south course but I can see them both in my mind's eye. My recollection is the bigger one is the better one but I don't know which one of those architects did which. Wilmington C.C. is a big full service type country club, though, it's quite beautiful and in recent years they've had some very high profile supers, one I think was the son of the super at ANGC---but I could be wrong about that.
I'm not adding much here, sorry about that--maybe I shouldn't have posted. Dick Wilson, though, with one of the Wilmington C.C courses as well as Bidermann nearby has a pretty good architectural contribution in the Wilmington area.
For those who've never been in this area of Wilmington---the rte #52 corridor coming from the west into Wilmington--should see it---it's without question one of the prettiest rural residential areas one can find anywhere. Some call rte #52 the "Dupont corridor", I guess because there're so many big old Dupont farms and estates along it including the truly beautfiul "Winterthur" which is contiguous to Bidermann G.C.