It depends on your dates to some extent. We had the package for our first night last year(12/16/04) with dinner at the Garden Grill. We were so impressed by CP that we tried going later during our stay just by waiting in line. We didn't get in that night. So we plan on doing the package twice this year- both Garden Grill and Biergarten. We will do LeCellier as a normal PS sometime so that we can use the DDE and have the option of sharing the meals so we can have soup and dessert. BTW, our trip this year is 12/17-12/24 so we know we have to do the package to get into the CP and it is worth it for us. However, LeCellier, Coral Reef, etc would not be cost effective for us as it doesn't fit our dining style.
We visited Petersborough in 2003 so I could race the half Ironman held in July- great race, didn't see much of the town though. Hope this helps although it probably doesn't.