If you have a warming rack you could hang a wood dowel with S-Hooks towards the front...you may need to remove the cooking grate(s) to allow enough space below the dowel for sausage loops. If no warming rack, drill holes in the ends of the barrel/lid and add simple brackets or hooks inside to support the dowels, higher up for more clearance. Given a choice, I'd remove the warmer rack and do the mod to achieve the largest clearance...this will increase your capacity exponentially, and, I'd consider using 2 or more dowels, depending on barrel diameter...larger diameter should accommodate 2-3 dowels. If end-space between the warmer and the lid/barrel allows for a well thought design, the sausage dowel mod would not interfere with the warming rack...just lift-out the dowels and re-install the warmer rack with the dowel supports still in place. Makes for less fuss to convert to sausage smoking, then back to conventional hot smoking.
Eric