Whether or not you should peel potatoes before using them in crockpot dishes or boiling depends on personal preference and the specific recipe you're using. Here are some considerations to help you decide:

1. Texture: Leaving the peel on can add texture to your dish. Some people enjoy the slightly firmer texture and earthy flavor that potato skins provide. However, others prefer the smoother texture of peeled potatoes.
2. Nutrition: Many of the nutrients in potatoes are found in or just below the skin. If you leave the peel on, you'll retain more of these nutrients, such as fiber, potassium, and vitamins C and B6.
3. Appearance: Peeled potatoes tend to look cleaner and more uniform in dishes, while leaving the skin on can give a rustic or homey appearance.
4. Recipe: Consider the specific recipe you're making. Some recipes may specifically call for peeled or unpeeled potatoes based on the desired texture and flavor.

If you decide to leave the peel on, just make sure to wash the potatoes thoroughly to remove any dirt or debris. If the potatoes have greenish patches or if they're sprouting, it's generally best to peel them.