20 Year Old Whiskey And Scotch, Is It Still Good?

i have 4 bourbons, three are beam whisky or something, and one is spey scotch. Also have about 3/4 of a 26er of crown royal. All are pretty old about 20 years of sitting around.
the bourbons are unopened, and the crown must have been opened years ago maybe? over the past 20 years they have sat in my familys cellar, which is freezing in general cuz its almost two floors under ground and i live in canada, plus no windows or light and it was rarely ever gone into.
I'm wondering if it is still okay to drink all of them without getting sick from the age its sat around for. the crown royal was closed pretty tight and they are all clear and same normal colour.
Also i know it doesnt age after its bottled, but is there any possibility its going to be stronger than a newer 2009 bottle?
help cuz its the only booze i have for a party coming up.

thanks.