I use a battery tender but plug it into a timer so it only charges 4 hours a day. That way there's no chance if the tender should malfunctions that it will fry the battery.
If you're looking for a meet and greet just to get something started why not have a get together at a place like Quaker steak and lube in Chesterton on a Saturday or Sunday afternoon just a thought on an easy way to get acquuainted before having a larger event