Your game sounds awsome!! Ima have to try it sometime definatley, and as for the rule your thinking of putting in that sounds like a good idea. Or if you birdie u can take away a token or something as well. By the sounds of things i guess you can use any kind of chips or markers.. etc.
I've played little mini games on the course, such as closest to pin on the par 3's, and when one person has a long or very difficult putt they call it a $5 putt or $10 etc. and if the other person excepts its just a simple chance to win some money more or less lol.
Though i have attempted battle golf once before, didn't go over so well lol... Dent's was and still is a better golfer than me. I don't know if he'll remember it himself it was at are old CC.