The age of the roe isn't as big an issue as the condition of the roe. I've seen roe that turned to junk after a week in the freezer, and I've seen roe that was frozen very well, used years later and caught fish. Thaw it in the fridge, look at it and smell it. If it looks good and smells good, it's good. If it's gone brown and stinks to high heaven then it's not as good. I'd still use it (I'm cheep). Back when there were good numbers of coho in the Fraser we used some pretty funky stuff and caught lots of fish, and coho are as picky as they come.
As for whether or not to cure it before freezing, I think it's a matter of preference. After all, regardless of the quality of roe, it goes through some really drastic chemical/physical changes when it's cured. That's why we cure it.
So, forget about how long it's been frozen, look and smell, and go from there.
Above all else, keep it nice and cold when you take it to the river. Even the best roe turns into the worst roe after a few hour in the hot weather!
Great luck!