Welcome to the forum.
You will enjoy your Crockett Rifle.
As you stated alot of good reviews.
Take your time to find a good loading combination.
You'll different amount of powder, and patch thicknesses. My works good with 15 to 20 grains of FFF I use Goex and Schuetzen, I got real low on Goex, so I had to by Schuetzen, both work just fine for me. My patch is .015 prelubed pillow ticking. Tried .010 it did shot good, just seemed a little better with.015.
If you've been muzzleloading for about a year you've learned a good bit. After 1 or 2 shots I run a damp patch down the barrel, then a dry one. That's me, some do some don't.
One and basically the only thing I had to mess with, was the right size patch..... Do not force a large patch into barrel, trust me. The best pacth I found to buy is Allen's 7/8"x7/8" or cut the bigger ones to comfortable fit.
I will be taking mine out tomorrow morning, and hopefully shoot me some little grays, I've yet to get this season.
Take Care Stay Safe....
Fred.