Did you get the G&H Best Brown Flake #2, or the Samuel Gawith Best Brown Flake. It’s confusing, but they are two different blends and I’ve never had the SG Best Brown.
If it’s the G&H BB2, then you don’t necessarily need to let it sit if you want to try it fresh because it is fantastic right out of the tin. But
@minerLuke is correct in that you might want to dry it a bit before loading it.
You can always try it out and then jar up the rest to let it age for a bit because my stash has aged beautifully.
And congrats on the Radice. I have several and they are great smokers.