Brine bags big enough for turkeys have been available for years. Ziploc XL bags also come in various big sizes. If you can beat the price (including shipping) then it may be worthwhile. The only thing I would brine at a competition is chicken and that fits just fine in a gallon zipper bag.
"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
Remembering a friend