I bought this folding cart from Costco that does the job. It's a fair weight, but it's built like a battleship and takes all our gear except my keyboard, which is in its own wheeled case. My Pa1xPro in it's case would be too long for the cart, anyway. Amen to the bungee cords.
http://t.costco.ca/2-in-1-Steel-Hand-Truck.product.100082893.html

So it's one trip for the two of us.