I actually intended the ribs to be on the top most position. Got the potatoes in, then just slid the ribs in, and shut it, turned on. Then when posting realized I didn't put them at the top:) Too excited I guess...
As far as potatoes below the ribs. That was intentional. Want the ribs to drip on them. I think I'll like em that way. And if not, I'll try it reverse next time. Also, I have both Gold and Russet potatoes in there. Had the gold for a salad, didn't have time to make it ahead. So thought of adding some to the smoker, then had some russet and decided try them as well. If they all come out good, no problem, nothing will go to waste.
Thanks everyone for the comments, very appreciated.