When I bring deer back from MI it is already processed, frozen, bagged, and ready to be put in my freezer when I get home. I use regular ice most of the time.
I have one of those fancy coolers and just use regular ice. Once, I hunted in MI, got all packed up with the meat in the cooler, went to OH for a wedding and stayed there for two days, then went to WV and spent a day there before taking another day to get back to GA. The meat was still frozen solid when I unloaded it. This was November also so not hot.
I use the same cooler for transporting skinned and quartered game from middle GA to SE GA frequently. Just buy ice as needed. It’s about a 2 hour drive but I usually leave it in the cooler for 4 or 5 hours by the time everything is done. Don’t know how necessary it is but this is GA and things heat up quickly around here.
Fancy coolers have their place. Seeing average yuppies in impractical jacked up trucks riding around with their window stickers of a particular cooler brand (you know what I’m talking about) leave a bad taste in your mouth but for transporting meat long distance they are very viable. I often find myself wondering if those people just use their coolers for tailgates and pool parties....but who knows maybe there is more than meets the eye.