Are you guys doing the American trip? I don't know about this one, but it seems to be the hardest. For the Greek one you have a G1000 GPS system and the Argentina one had a XCub with a nice touchscreen GPS as well. I am doing the Argentina one and I found how to use the buttons in the bottom of the panel to set GPS heading and altitude hold. You can even use the lazyman's "direct to" button to go directly to destination airport of each leg, but then it takes out all the fun of the VFR flight.