I'll try to do that when I go this year. Privet definitely has a wider range of growing environments than morels - for example, it will grow in areas with soils that are too mucky and waterlogged for morels. From what I've seen sandy, freely-draining, but rich, soil is key. Areas that I've seen success in usually have tulip poplars, red oaks, and sweetgum, generally older trees, with a mid/understory that is either fairly sparse or dominated by thick privet. But that could just be because that's where I first found them, and so that's where I look.