It seems the true reason for carrying a GPS aboard a VFR flight has been missed here. Though it is capable of providing incredibly useful navigation information to the pilot, it's true purpose is to be the object of the blame when you have to explain why you were lost.
In the old days, you would have to simply hold the chart, with the pencil line, and try to come up with some reason why you had landed at an airport which was not at the end of that line. It was all your fault! It was just you and the chart, and everyone knows that charts can't be at fault!
Now, with portable GPS (portable for a reason I'll present in a minute), you can use highly technical terminology, make reference to global database errors, great circle routes, and heading vs bearing vs course made good, and generally dazzle your passengers into belieiving that the fact that you ended up lost, was truly not your fault, all while waving your hands around this technological wonder in the radio stack.
To ease your ability to use the GPS as you defense for being lost, and enable a larger audience than you can fit/coax into the cockpit, the GPS manufacturers have kindly made them portable, so you can actually carry that offending artificail intellgence pilot decision making unit to the club house/control tower, or wherever the accusations of pilot failure have originated. You don't have to risk your defense not being accepted, because all you could do was to point to an airplane across the apron, and promiss that there was an offending unit in the radio stack to be blamed.
So, look out the window to your heart's content. Leave the GPS running in the background. If you land where to intended, great! Receive the accolades, and take al the credit (even if you did peek at the GPS). If you ended up somewhere else, you had a great view out the window the whole way along, and you have the GPS to blame, so you pride remains intact! (and after a coffee, you can use it to actually direct you to where you had intended to go in the first place!)
Pilot DAR