The schedule is up on the schedules page (I even figured out how to do the link for this one too!) http://maps.wera.com/pdfs/2008Schedules/roeblingnat031917.pdf Pre entry will be open in a few.
So far the gate details are as follows - Open 5pm-midnight Thursday, 6:30am-midnight Friday and Saturday, 7am-done on Sunday. Fees are $30 for all 3 days, $25 Sat/Sun, $15 Sunday only. Not sure on power cost or any of that, check with the track at http://www.roeblingroad.com/