Just did a California round-trip and nary a word from anyone.
I also checked the TSA site, and the FAQ addresses the question with the assurance that e-cigarettes / vaping equipment are okay (within the usual 3 oz liquids limits).
I might suggest just put all your stuff in the carry on. Had a wee bit of leakage on one tank in the checked in luggage (in a plastic bag), likely due to the aforementioned pressure changes.
And yes, I did sneak a stealth hit or 2 along the way. The only response was a dirty look from my wife the couple of times she actually saw me
Have a great trip!