If the bike is stock you don't have to worry about failing tech. Some places will require a tether, but GLD never checked me for that. Cost depends where you go, usually around $20 a night...but it changes depending what day it is and if they have events running.
If you really want to get into it and get the bike to launch hard, get lowering links for the rear, strap the front, and gear the sprockets down.
I don't know if you know how the waterbox and tree work...but when you're rolling up to do your burnout, go around the water. The waterbox is for slick tires only. If you roll your bike through it you'll piss everyone off and they'll have to mop it up. If you want to do a burnout, do it after the waterbox, closer to the starting line. But don't pull a squid move and do a giant rolling burnout on your stock bike. 5 seconds max is all it takes to clean up a street tire and put some heat in it.
For the tree, you don't actually start right next to it. First timers do this all the time. There's a box about 15-20 feet in front of the tree that has beams that your tires set off. Roll up and get your front tire in the first beam...one of the little yellow pre stage lights on the tree will light up to show you made it. Roll another inch or so and you'll set the second set of small yellow lights, now you're staged. If you're racing against someone else, don't set the second stage beam until they have at least set the first beam. Now the tree is ready to go. There are 3 yellow lights, each one will light up, one after the next. Launch that sum bitch on the 3rd yellow, do not wait for the green. The green lights up a half second after the last yellow, so you'll leave at the same time it's green with a perfect .500 reaction time. If you jump and go sooner, you get a red light. The green and red don't even matter if you're just racing for an ET, and you can actually wait as long as you want if you're not comfortable...because reaction time isn't factored into the ET anyway.
Be very careful launching the bike at the track the first couple of times. The surface is like glue compared to the regular street. Your r6 won't spin at all on a well prepped track...and will shoot you right for the sky if you're expecting to launch it like you do on the street.