Simpler still (and portable) -

A suitably strong ramp for the back of the pick up and a two-wheeler
with good tires (the air-filled ones are better than the solid kind, in
my experience) and just roll the kegs up and down.

You can probably find a suitable handtruck at Home Depot or similar or
if you want fancy, you can get one made for keg moving

<http://www.handtrucks.com/hand-trucks/specialty-hand-trucks/products....>

And for a ramp - http://www.fivestarmfginc.com/archedramps.htm

I am sure all this is available locally where you are, the links are
just for the examples.

Randy