Not sure about the one in Marshall, I think it is still going, but I know some people who jump/jumped there so I can find out if no one else chimes in here.
I jump at Skydive Allegan and have never heard of Parachutes LLC as a DZ, but looking at the address (the hanger next to Skydive Allegan) it is the sister plane from the defunct DZ in Gobles, MI. I have watched the plane's owners jump from it, but didn't know they had "opened it to the public".
AFAIK, the DZ in Marshall folded up their tent many years ago (someone told me it was after the Beech 18 ground-looped, but my memory is fuzzy on that, at best, so take it for what its worth).
I had jumped there many years ago, typical beginning of the season type situation where one DZ is actually jumping before all the others in the area. At the time I was rather unimpressed with the condition of the 182 they were flying (every vacuum instrument was placarded, and there was more duct-tape in that plane than a Home Depot). I made 2 jumps there and called it a day.
Mind you, that was close to 15 years ago.
(This post was edited by dninness on Jul 25, 2012, 6:57 AM)