Here's the background: I am the sole owner of a ski lake that has just about every amenity you could ever want. Enclosed boathouse, new or nearly new 196 for the last 8 yrs, boat on a lift(no trailers needed), areas for storing ski gear, ideal lake depth, totally accurate course, bathouse with indoor plumbing and frig, etc., etc. The way I run the club is by selling for a flat fee memberships that give you unlimited access to the boat and lake. There are 8 members including myself. Basically the only rules are that you pay $0.50 per pass for gas, you try your best to take care of my boat, you pick up after yourself, you contribute to the functionality of the club by driving for others and by taking the 5 gallon jugs to the store 3 miles away to get boat gas. My members are all good people and the same core group has been with me for several years. We have had a lot of good times together and having the lake has been a rewarding experience. Some of the guys work their tail off at the place and some of them don't because they don't have time or whatever. Some of them instinctively know what needs to be done and they do it and some of them have to be reminded. The only part that bothers me is that some of them aren't very generous when it comes to driving for others and going to the store to get the boat gas. Some people end up driving way more sets than they ski and some people never go to get the gas. To make it fair for everyone, I am considering charging a 10% higher fee to the ones who don't drive at least 1 set for every 2 they ski and the higher fee would also apply to the ones who don't make at least one gas run for every 20 sets they ski. Do you'll think this is fair? How have you handled things like this? Thanks