Basically everything said pretty much confirms....if it's not broke don't fix it...stay with the Polar Bear. It has worked for me several times. I read about it here several years ago, I was just seeing if anything better has come up.

I checked on the CO2 at Delta and seems a bit of a hassle. Like everyone else said by freezing everything good and hard before we leave it is still good that night upon arrival. We use some "Gell Blue Ice" to help with the journey.

So I think stay the plan...1 Polar Bear for the frozen food...then one small case for some dried goods. Mainly this is food that is particular to the peculiar tastes to a few of the crew. If you catch my drift.