Here is one other idea BZ. If you love seeing appreciative people enjoy your pond and it sounds like you do just like me. Kids and less fortunate is where its at. Never had anyone with a terminal illness but that must have been one of the proudest moments ever experienced.
I had one dad from my work place ask me if I would allow his troop of boy scouts up to my place for a day. Kids could earn merit badges for variuos things one of which was fishing. I said no problem as long as all the boys raked pond weeds and hauled this firewood out of the woods. They got a great day and I was compensated with labor from 14 people.