Hey Will --
One of the best things I ever did for myself was to look at the pix, the old house and Google Earth. A terrific reconnect. But when it comes to places where the CSA happened, the church camp has been sold and little is recognizable (fortunately) and most of the school is being knocked down for a remodeling (fortunately). Hell, I'd be glad to help 'em destroy the place.
For myself, however, I have a really deep sentimental streak and, though I don't keep them out, my childhood keepsakes are kept carefully stored...here in the house. I suppose it depends on when the CSA occurred for someone. My keepsakes are from the time prior to the CSA. After that, there's very little I ever kept.