When we get home, we dump the extra minnows on some newspaper (If they're still jumping around, lay another piece on top of them so they don't go everywhere). After about 15 minutes or so, the excess water is absorbed into the newspaper. I then dump some regular old table salt into a zip loc bag, then scoop up the minnows and put them in the bag. I shake them around and coat them as best as I can, and throw them in the freezer. The salt keeps them from freezing completely, and sticking together. I don't see any absolute need to freeze them before salting them. If you put enough salt in the bag, it absorbs some extra moisture too. They end up being a little dehydrated and kind of tough. They actually stay on the hook very well and seem to work just the same as fresh shiners.

When we take them fishing, we keep them in a very small cooler filled with ice. It works well, just keep a towel next to the cooler to wipe the salt off of your fingers..