just one, make sure you have enough draft on the bottom. A couple 3/4" nipples with ball valves is better than one large one. I have three on mine. Ball valves are important so you can control your flow.
OOP's, a little to far for a UDS build party. Wish I could give you a hand with it. When you do get it built don't forget to post some Q-views....I love to see others ideals on builds.....Shoneyboy BTW: " Happy New Years"
I use water pans in both my uds's. I like them as they keep my smokers clean and I don't like the taste of sour smoke thats created from burnt fat. I say try it both ways and see which way you like. Here's something that might help ya out in your build.
Thanks everyone I think (not good for me).. i have a plan I've read and searched sights and links for more hours than it should take to build it. I'll try and post some pictures and updates when i get the barrell i ordered.