Quoting the part of th website you're talking about:
3/4/2007 - Terrain Park is OPEN
February
was a killer month packed with rockin' events every weekend. Now that
the events are done, guess what? The park and pipe are OPEN for your
uninterrupted pleasure! The next event will be held March 24-25 and is
the "Round Two" event, sponsored by the Duluth Board Shops. Watch here
for details. Until then, ride...
this did not mean you could not ski the park in Feb. there were, however, comps every weekend. the comps only last for a few hours each day, though, and there was usually only a comp on one day each weekend