I have a decent Hasselblad system as well and when traveling I take two bodies and my 50, 150 and 2x. When traveling by car locally I do as you do and carry what I think I will use and leave the rest ( 250 and 350 ) locked in the trunk. If the trek isn't to be too long I take my larger tripod but when traveling or planning a lot of walking I take my carbon-fiber tripod. I carry the cameras in a camera back pack which makes things easy. I'm no youngster but I'm in very good physical condition.

That said, I think depending on the subjects you like to photograph the Hasselblad may be more versatile especially if you also want to do still life at home or portraits.