I've been using fresh cranberries for my Cranmoor (Cranberry Ale) and its turned out fine, but it really messes with my OG/FG due to the unfermentable sugars I suspect. I never know how to get a good read off it. So I was thinking of instead of added 3# of fresh cranberries to the fermenter, but making extract. What I saw was...
1/4 cup crushed fruit
1 cup vodka
Add together in sealed glass jar
Let sit for 3-6 weeks, swirl occassionally
Filter out fruit
...and I assume you'll have approx. 8 oz. of fruit extract, which I would add to the bottling bucket before I siphon the wort.
I may give this a try.