Yep, BTDT. At the time I was riding the LT, and it was the only one there (BMW day at Buttonwillow in November '05). It sure made me realize how heavy that bike is but I had a blast, held my own against the other riders, and even managed to pass a guy on a K1200S. OK, so he couldn't corner to save his life, but he sure did rocket away on every straight. Eventually I carried enough momentum through a tight section leading into a long sweeper that I just scooted on by him.
What Billy says is the most sensible way of doing it. Instead I got up super early and rode the 100 miles there, ran the track day, then rode home that night.
Do make sure that you have excellent tires. If they're worn more than 50%, then change them out before you get there. You will eat up a lot of rubber, and a whole lot of fuel, and it will be well worth it. I get 40-45 mpg on the LT on public roads, but got closer to 26 mpg at the track.
Also, take heed when they say to warm up the tires fully before getting on it. We had a guy on an early-generation GT that overpowered out of a corner on his first or second lap and low-sided. He was much more cautious after that, as were we all.
I'm definitely gonna try it again on the GT.
'13 Dark Graphite Metallic K16GTLD, 24K miles and counting...
'09 Magnesium Beige Metallic K13GT, 60K miles miles and counting...
'02 Mauve Metallic K12LTC, 106K miles and sold
BMWLT#145, IBA# 366, MOA# 111996, SCMA# 24032
All lower 48 states plus Alaska on the K13GT in two weeks . . .
Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...