I'm not sure what that recommendation is guarding against. Obviously the white gas has been transported to the point of sale, and lots of people take cans of white gas camping in remote areas without incident.

The real concern with white gas is a mostly-empty, closed can. The vapors can make that into a bomb. So the recommendations to guard against that would be A) carry only mostly-full cans, and if you must carry empty cans, carry them uncapped (and give them plenty of time to air out before putting them in your car; B) keep them cool; C) don't jab pointed objects into closed cans, as that could cause sparks, leading to the bomb scenario.

ive left white gas in my trunk for months, though i probably shouldn't have. i've taken white gas with me on trips that have been well over four hours, keep it in the trunk of your car and you should be fine.

I've gotten out of a car at the top of a mountain to find my white gas cans had done that pressure build up thing any other bag will do when they undergo a drastic incline in elevation. That worried me a little but nothing exploded.