Take care of your bait

Caught a mess of creek chubs yesterday to use for catfish bait later in the evening. Had them in a gallon ziplock bag and put them on the front porch to go eat lunch. The wife didn't want them in the fridge, and I was going to use them anyway later that day, so didn't think anything of it.
Well, after lunch, then some other things I had to do for wife and kids, I went outside 2 hours later and my bag of chubs turned into a bag of mush. The sun literally cooked them and they exploded from the gases within 2 hours of being caught!
I usually use just the heads anyway, so figured the heads would still be fine, NOPE! The heads literally fell apart as I examined them.
So now I have a bag of rancid chub mush that I will still use. Thinking about freezing them in ice cube trays in MY freezer in garage to use for bait, but I still prefer fresh bait to stink bait.