Another option to think about is a box smoker like the Spicewine cookers. They will run for hours on a single load of fuel. Spicewine makes a trailer version but it is above your range. The Medium Spicewine is in your range but you'd have to provide your own trailer.
"Ron Rico, Boss. You can call me Captain Ron..."
The Naked Fatty!
FEC-100/BWS Party/Memphis Pro SS/PBC/LBGE X 2/SBGE/Mini BGE/Nomad Pellet-matic/Good-One Model 42/WSM X 2/Cookshack Smokette 008/Weber Performer/Saber Cast 500/Weber Gasser (RIP)/Weber Kettle X 2/Weber Smokey Joe/WGA/UDS/Coffee Roasting Gasser and a pickle
Remembering a friend