If you can get your UDS to maintain 350-375 degrees, the other option is to do a high heat cook starting in the morning. Check out Brother Ed's (Kickass) site for his take on high heat smoking.
Here is a link to his Quick Cook Butt method
Jim - Another transplanted Texan
Former KCBS CBJ
Large and Medium Big Green Eggs , Black 18.5" WSM, Blue Weber Performer - Stainless, Green Weber OTG Kettle , Brinkmann SnP Pro, and a Stainless UDS. One retired Portable Kitchen grill.
Red Thermapen, Maverick ET-732, EdgePro Apex Sharpener.
Avatar is the original 1951 Weber Kettle