heading to Reno this weekend, i know my ccw is not valid there, what are my options for transporting my handgun once i cross the state line ?

You can have a loaded gun in your vehicle in Nevada.  This isn't California.  You're not compelled to transport your firearm disassembled inside a locked box separated from the ammunition that's been removed from the magazine and then placed inside a time-lock opening safe wrapped in battleship chains and submerged in ten feet of water like some Great Houdini escape artist performance as California law requires you to do.

Don't conceal it on your person if you haven't got a CCW that NV recognizes.  You can stash it in your glove compartment or whatever.  If I were you, I wouldn't place your gun on the passenger seat covered by a jacket or anything.  You shouldn't also wedge it down between your seat in some little hidey hole that's covered by any part of your body.  I'm not even going to entertain the goofy notion of 'open carry' inside a vehicle.

Don't leave your firearm unattended in your parked vehicle.  

You can't transport a long gun in your vehicle with a chambered round.

Observe all traffic laws like a good citizen and I'd presume you're not even going to see law enforcement officers anyway.