Kevin,
The butts look great, bark or no bark. I never foil butts when I cook them as I just don't think they require it but that's just my preference. Lots of folks foil them and turn out great product.
As for a rub that goes good with CT, I have been using Jan's Dry Rub(from the recipe site) with CT and knocking out some killer smoked wings. You might give it a try.