I do sweet potatoes all the time ~ oil them and coat with kosher salt. Come out so sweet there's no need to add anything IMHO.
Super fast Purple Thermapen
Custom Reverse Flow 55 Gallon Drum Offset
Weber SS Performer date code EE
Weber 18 and 22.5 OTS Kettle w/Marty's handles
Smokey Joe Silver w/wooden handle a.k.a. Mini Me
Weber Smokey Joe Platinum date code ER
Sipsey: Secret's in the sauce.