Thank you All that responded. I guess no one did Plan A as far as travel goes. Plan B is to leave my handgun in Vegas on a July trip with a Handgun person secured and retrieve in August. I guess that solves that. Definately will need a brain surgery if i ever consider moving to California (IM NOT) MAHALO!
NV passed a law a few years ago that if you let someone "borrow" your gun, then they must complete a background check (NICS) at a FFL, just like how a private party sale would take place. Exceptions are relatives, at a range, at a competition, public performance by an organized group, or in the presence of the owner (can't leave borrower alone with your gun). And immediate danger exception, like a mountain lion is following us and we hunker down in the car, but take my gun because you need to go outside and walk further to get cell reception because I am unable to do so. When I was in Vegas last month, a mountain lion was caught on Mark Twain Blvd, which is a residential high traffic area.
Then when you want to take possession back of the gun, you must then both go to the FFL again and they will run a NICS on you.
IDK about "leaving with a person who will secure it", because they are not going to use it. This could still be considered a "transfer". There is no law for your secondary residence or place of sojourn. So if you leave your gun there secured, then I see no issue. But to articulate you left it with X person might be a different story. Odds of getting caught are minimal, but no one here does anything illegal.