I would just place them in a ziplock bag and freeze them until you go fishing again.
It's worth point out that people going fishing with frozen bait, and I doubt it would smell.
The single most widely available bait in Florida is the Frozen Shrimp. Many bait shops bag and freeze any shrimp that die in their live shrimp holding tanks at a discounted price. Other frozen shrimp come strait from a distributor, these frozen shrimp range in quality from freshly frozen to shrimp that have been frozen and thawed many times (reducing the quality of the bait)
Live or Frozen Shrimp for Bait
I don’t catch my own shrimp, but I do buy them sometimes. When I have some leftover, they too go into plastic bags and get frozen, unless they are jumbos. Those go in the frying pan! The same thing applies to frozen shrimp as it does to every other frozen bait; keep them cold until you put them on the hook.
A Quick Guide To Freezing Bait