Mike, there is a Park nit far from where I work where the park personnel do all the upkeep like cutting them back on them. They do this mainly to keep them from growing into their fields. There is literally acres of them surrounding all of about 10-12 fields and they grow into the woods also but those typically get smaller as they dont get as much sun. I picked about 40 lbs 2 years ago as did my buddy along side of me. We didnt even put a dent and there were many others there also and they were grabbing them to make pies and jelly and many other things. Next year Ill have to hit this field again as my raspberry wine will be getting low by then.Serious! Do they not pick them? Don't Raspberries have to be maintained like grapes to get them to produce each year (only produce on new stock)?