I bring mine, but they're a bit smaller, making some options easier. Still -
a) keep it out of the sun
b) you can yank the batteries to be extra safe - but keep THEM out of the sun, too
c) if it's really hot (it IS, here - over 100 all week!) you can make a space for the mod in a cooler!
Like with some of my small ones, I can tuck them in something like this case, and drop the case in a cooler...
Maybe you can figure out a way to do that - keep it dry, but cool.
When it's ON you, I don't think it'll be a risk - just the liquid will be thinner, and you could leak if you're using tanks adjusted for inside temps.
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