I've just read this post about 15mins after finding out I have to work that day. The only weekend I have to work all year and it is this one!!
Have fun and hopefully catch up at another one soon.
Are you thinking of going into White or Yellow group? I did CSS and then a track day the week after back in July. Because I had booked early I went in the White group. After the 1st or 2nd session I tried to move up to Yellow. You pretty much have no chance of moving up though because most groups are booked out so your only chance is if someone crashes or is somehow able to move to another group. If you end up in White, leave plenty of space between everyone and don't be in too much of a rush. Just enjoy yourself