If you try and go just once, weekends are tough. Lines are super long except at the very first and last couple of hours of the day. I'm of the mindset at this point the only way you can enjoy Lagoon is a season pass. Go at nights when the crowd thins out and no lines and you're not worried about getting your money's worth

If you're set on one day, get out pass 1st. The only other option you'll fine in the 75.00 category is if you find somebody on KSL looking to dump the free tickets they got from their workplace Lagoon day.