I wouldn't think you would need heat packs this time of year, and I never use cold packs. I did not include any heat or cold packs in my test package when I sent mine in, and it passed without them.
I meant heat packs if sending in test shipment for cold weather or ice packs for shipping in hot weather. I asked my red what to include and she said to package it exactly as you would minus the live reptile. So I did, I included a cold pack. Passed fine.