Leave that same dry ice in an ordinary $1.50 foam cooler with the lid on and it will last about 50-70% longer , especially in shade .

CO2 isn't the only thing skeeters home in on , the plume of gas just extends their sensory range . They also key on body heat , and sweat electrolytes . Some research theorizes that they may even be able to detect our electromagnetic field , but it hasn't been conclusively proven . I'd stick with an unscented repellent with plenty of DEET for now ... [&:]

A deer may smell some elements of your breath better than others , but it isn't likely with CO2 since it has no odor . That sausage , egg , and cheese biscuit you had earlier is another matter...