Here's what I've done and had great success with:
1. Apply seasonings of choice
2. Wrap in seran wrap and leave in refrigerator overnight or longer
3. Smoke at 225 for a minimum of 6 hours.
I've done them for 8 hours and they were excellent. It you want a crisp exterior, brush with melted butter and garlic salt about an hour before you're done. Hope this helps!