My standard carry-on bag holds D700& grip, 14-24 and 70-200 lenses, small laptop, kindle fire HD and a quantity of memory cards. Monopod goes in the hold case.
I've carted that lot across the atlantic times beyond count with work, as well as many shorter trips. It's been tramped round Yosemite, and lugged round SFO, Boston, and many, many other places.
I've also lugged it on a 3000+ mile trip round Europe in an old VW camper with limited security through 9 different countries, including a decent amount of time in Croatia.
The only time I've been nervous with it? Late one night in Newcastle!
My point is, I completely agree with the previous poster - Take it, take it all, don't worry about it, if someone wants to nick it well let them, its only a camera, but you'll kick yourself if you don't have it..