First let me say be very careful catching bait out of the river and streams unless you are going to use them in that same water. They can be the types of baitfish that you don't need to use in other lakes. Such as asian carp,snakeheads,etc. that can get started and ruin everything. Now what I use to keep bait alive is called Better Bait you can buy it at most sporting goods and bait stores. You need a good aeration and be careful of using water that has chlorine in it like what I call City water. It also helps to use a ice chest or styrofoam minnow bucket and keeping the bait cool. Don't put to many minnows/baitfish per gallon of water and keep the water changed out or filtered because of the ammonia(poop) build up in the water.
BETTER-BAITâ„¢ Minnow Holding Formula