I believe in past years there was a "competitor" priced lift ticket. If I recall it was around $25-30. It's been a few years since I have done Loaded Turkey, so not 100% sure. It's an upper mountain rail jam so you definitely need a lift ticket.
You can get a voucher for 2 for 1 Killington Lift Tickets for early season here: http://www.killington.com/site/2for1/2for1-ski-16-17
I wouldn't be surprised if that's the cheapest way to go.