I do not own a crockpot. My pork loins go in a 300 oven, covered, for 4-5 hours. If I'm making BBQ, I cover the pork with a dark cola, brown sugar, onions, and chipotle peppers in adobo sauce. If I'm making the pork to serve as a sliced roast, I add beef broth and onions to the pot. At the end of the cooking time, I take the pork roast out to rest, bring the liquid in the pot to a boil, reduce if necessary, add my slurry to thicken for the gravy. My oven roasted pork is never dry.
One of my wedding gifts over 40 years ago was a Sunbeam crocker, cooker, fryer which was an awesome kitchen appliance. When it died, they were no longer being made, and I've never had the desire to add another slow cooker to my kitchen.