Last year we created a ski league that pretty much does what the OP is asking for. A description is below. We had 100+ skiers over five states last year. We are re-tooling this off season to work out some of the kinks we discovered, and we will be taking registrations later this spring for the 2018 season that will run June-August with a two week playoff series.
(OPEN TO SKIERS THROUGHOUT THE NATION)
The league is virtual weekly team slalom waterski competition open to adults and junior skiers who enjoy skiing in the slalom course. No minimum level of proficiency is required, only a desire to get better at skiing the slalom course. Handicap scoring equalizes the field from beginners to experts. Skiers will compete at their own sites, with their own boats once a week, on their own schedules, and compete virtually against other teams throughout the country. Skiers on the same team can (and have) competed alongside one another each week while skiing in different states. Each skier gets a minimum of four passes every week. Certified judges and drivers are not required. Any boat can qualify as a permitted towboat. Speed control is not required. Teams can range in size from 3 to 10 skiers.