Exciting! I don't have answers about the yeast, but the directions my LHBS emailed with my order said the following:
Step 1 – Once you get your pail home, open the lid and stir in a solution consisting of 4 tsp
Bentonite in 1 1/3 cups warm water with a sanitized spoon. Be sure to stir the bottom of the
pail as well to mix up the yeast that has settled.
*Advanced Option – If you would like to add your own yeast strain to your pail, stir in a
solution of ¼ tsp Potassium Metabisulphite in ½ cup cool water to the pail to kill the
existing yeast and wait 24-36 hours before pitching your desired yeast strain and
proceeding.
I ended up stirring in the Bentonite in the fermenter before I siphoned and then poured from the juice pail into my 7.9 gallon fermenter, and added 1/4 tsp kmeta during the transfer between buckets. I'm really happy I did that, because even the 7.9 gallon fermenter wasn't quite big enough for the Renaissance Avante yeast and I got a bit of overflow for a few hours.
If you want the full instructions my LHBS sends, DM me your email addy and I can send the PDF.
Edited to add pix: