Just a thought here.
Old Blue brought up temporary tank and I thought of those bait bags that hang over the transome.

West Marine has the Aquaworlds 28 gal.on sale now for $120. Easy to install and remove and they stow away nicely. Throw a net over the top and two of these bad boys would give ya 56 gals of temporary bait holding capacity for the first day than break em down and stow away.