Electric roasters is how we roll here in the Heartland, but it all depends on how long you need to keep it hot. For extended times, I would suggest a hot box then transfer to a warmer dealie like Mista suggested.
Senior member of the Brethren
Weber Platinum Kettle, Weber OTS, Meco square grill, ECB, UDS, WSM, a cool fold up camping grill, Blackstone flat top camping stove, The MOAB, and now the proud owner of a YS640, MOINK.
Pitman for All Things BBQ cooking classes.
Smoke on Brother KC
Father of the Fatty (the name) 4/20/04 on the BBQ Brethren with inspiration from Brother parrothead.