I carry one lens on one camera with no strap on (sometimes) one tripod. If i'm making a big fuckin' deal out of the day or i'm shooting 4x5, it all goes in a banker's box stuffed with a comforter. nondescript to a passerby, sturdy, easy to carry.
I used to carry every lens and accessory I had in some nice $150 camera bag (lowepro, i think), but I felt like a gearfag hobbyist or a theft target or an epileptic wearing a bicycle helmet every time I put it on. Plus, that's a lot of shit sitting in one bag, and you start losing little stuff, or you get nervous at the skate park when the wayward truants show up and sit down right next to your camera bag stuffed full of an easily portable three grand.
take only exactly what you need (not what you think you MIGHT maybe need), leave everything else in the closet. trust me. your life will be so much easier.