Just finished a 5lb. Pork belly after a 5day cure and about 4 hours on the Weber kettle. I decided to use the kettle instead of the uds just for simplicity but I think you could use the same concept I did to run low smoke in you uds.
I made a snake of charcoal that gradually got bigger. Started with only 4 lit coals, then stacked them onto 4 unlit coals then gradually grew the snake up to about 10 lit coals. I put the belly on when temp was about 140 and it gradually grew to 225ish all the while smoking the belly with cold smoke generator but you could use chips.
Depending on your coal basket you could likely do something similar with uds. I'd use a defuser plate so no direct heat gets the bellies.
Let us know how things work as I'd like to try using the uds for multiple bellies at some point.
BTW I used Thirdeye's recipe and it turned out very good. Best bacon I ever ate.
2004 Weber Performer GREEN
Orange Super-Duper Fast
Taylor Made 9deg. R7TP w/S-Fujikura 6
Rescued 2002 Weber Genesis Silver B Gasser
SJG Tamale Pot Mini Smoker (SJG was a rescue)
18" Gold (rescue) SJS (rescue)
and a Pyro FIL