Fresh cranberries are plentiful and you'll start seeing them go on sale this week. You can find them in the produce section of your local market. If you don't see them, ask for them. I've even seen them at the discount markets such as Aldi, Save-a-Lot and Pricerite.
Fresh cranberries can be frozen for up to 6 months (I've even pushed it to 9 months) and you can use the frozen cranberries the same as you would fresh cranberries.
Check out some great cranberry recipes for Thanksgiving.