2 days should be good. Like others mentioned it can take 1 day to do all the coasters. Then there's the flat rides, soak city, restaraunts, shows and soaking in the ambience in general. While this site is mainly centered around coasters I think sometimes people forget there's much more to parks than just coasters.
Just for the record my wife and I once spent 4 consecutive days at the point (stayed at Sandcastle even ) and were still sad to go. CP is just a really great place.
*** This post was edited by Lord Gonchar on 8/30/2001. ***