I've gone twice. Once on a Sunday late in the season (Nov ? ) and left around 2:30 PM without getting a single run in.
The other time went on a Tues evening and brought my dinner. Got one pass in around 9:30 PM and estimated I might get another before closing. Or might not. Didn't feel lucky and went home.
Might do better paying to race (rather than just running for time) as I *think* you usually get a second shot if you lose in the first round of gamblers, or at least get one test run before race. I think thats how it was at Island and E-town. Once in a while we did that. But usually I had my coleage from work drive. He was much better in reaction time and getting the car off the line (had run stock eliminator upo until a few years before).