We just got back from a sucessful elk hunt. However we found out nearly the hard way that dry ice needs to be in a well vented area. We had went in a store for about 2 hours with the windows up in our rental SUV and when we got back into the car we had trouble breathing intantly. I thought I was having a heart attack immediatly. Just so happend that my buddy was experiencing the same thing too and he thought he was getting asfixiated. Our coolers were taped up all around the lip of the cooler and strapped shut. I posted this just to keep everyone aware of this. I feel as though it should be posted on all coolers that provide dry ice. This is the first elk I have shot that has ridden back with me in a SUV. All the other times it came in the back of a truck.
Good luck.
Good luck.