No thanks! Been there, done that. As stated elsewhere, ITS runs with ITB, SSB, SSC & ITC. The ITS front guys catch most of us pretty quickly, usually within 5 or 6 laps, and usually in a train, but they pass us clean and give each other an inch or so to do so. It's almost fun wactching them coming through and sometimes giving a wave. If you're in a race yourself and they're alone, they'll give you a chance to get through the corner so they don't split you up. Honestly, the entire group is a very nice collection of racers who will drop everything to help you out, but gettin' it done on the track!
Al forgot to mention our own WDCR SCCA track day events, called PDX. We have been working hard on the program for 6 years and it's become a very popular program. We've worked in a Track Trial event day specifically for race prepped logbooked cars, and we are trying to repeat last year's schedule where we had the TT event 2 weeks before the SCCA CR Driver's school. It gives you an excellent opportunity to shake down the car (and driver) before the season begins. Detail below.
AJ
http://www.wdcr-scca.org/TrackDaysTrials/AboutOurEvents/tabid/97/Default.aspx