Never been to Remington Mill specifically but I do a fair bit of ghost hunting round the Somerset area and old mill buildings are genuinely interesting locations. Something about the water proximity and the old machinery apparently creates decent conditions for activity, or at least thats what some of the more experienced hunters reckon.
Curious what you actually experienced there. Was it visual, auditory, or did you get any readings on equipment? I run a spirit box fairly regularly and old industrial sites can produce some really odd responses, more so than your typical abandoned house in my experience.
Anyone local to Coldwater County who knows the history of the place? The background always helps put the experiences in context before jumping to conclusions.