I cook all my dry bean products in a crock pot for 8 to 10 hours on low. I use smoked hocks or fresh hocks, or jowl bacon, smoked rib tips, sometimes with onions and garlic. I soak the dry beans overnight of for 8 to 12 hours. Navy beans is my favorite. I'm going to try the 15 bean soup beans with some ham in my crock pot.
Here is a great northern bean recipe?!! The only thing I would change is two cans of low sodium broth instead of three cans, replace it with a can of water to reduce the sodium content?!!
Smoky White Beans & Ham
https://www.tasteofhome.com/recipes/smoky-white-beans-ham/
I do beans now in my Instant Pot. I really love it. No soaking. Great results. Did a batch of black beans for black bean and chicken last night. Took about 45 minutes. Hands free.