@Horton - In case you haven't seen this from the Nationals webpage:
The Practice Lake opens Monday, Aug. 7 at 10 a.m., and starting Tuesday through Friday at 7:30 a.m. Practice will end 30 minutes before sunset each day. Lakes other than the designated Practice Lake will be open Monday through Friday per the Chief Tech/Judge approval and depending on boat availability. Competition Lakes will be open 30 minutes after completion of that day’s skiing. NO congregating around dock until completion of skiing please.
Slalom – 4 Passes, $40.00
Tricks – 2 Passes, $40.00
Jump – 3 Jumps, $40.00
You must register at the Clubhouse starting 8:30 a.m. Monday, and Tuesday through Friday at 7:00 a.m. NO refunds given on unused tickets. Releases will be signed at the practice lake before you can participate. YOU MUST GO TO CLUBHOUSE TICKET WINDOW FIRST!