No , don’t vent. I’ve used dry ice several times with great success.
Like mentioned above, put a barrier ( towel or several paper sacks ) to keep from freezer burn.
Also don’t handle it with bare hands. You can get almost instant frost bite.
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We use to wrap fish in paper bags and pack them in dry ice in styro foam coolers. We would then tape up with packing tape. The keep fish frozen for a very long time.
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We ship frozen/vacuum sealed salmon from Skwentna, Alaska to Shelby, NC (About 4700 miles and two days) in cardboard boxes with aluminum bubble wrap liners and no ice of any kind. Do it every year during the second or third week of August. Never had a problem with any of it. I don't know how cold it is in the cargo of a jet, though. Maybe below freezing all the way?
Definitely not, I prefer to make sure it is in the back of the truck. You want the cooler sealed well if hauling inside the cab, do not open to check. Dry ice gives of Co2 and can have a negative effect.(don't ask how I know) We usually wrap the dry ice package in newspaper works great. But just put the stuff you want frozen in the cooler as the dry ice will freeze everything.....including beer.
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Long trip with frozen food. Don't pack in water but double wrap, freeze and pack in dry ice!
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No one is saying anything about the Yeti cooler that’s supposed to keep ice for extended periods. I travel ten to twelve hrs home from Kentucky Lake with my frozen fish in a cooler with a bag of ice covering them and they’re still frozen when I get home. Never thought about using dry ice. I guess half a day is a short trip.