Divert....simple as that. There is no way my wife would use a portable thingy. Do it early though, I was once over the SW USA deserts en-route to Laughlin and was busting. I could see Laughlin in the distance but it was still a good 100miles away and there was no where else to land (we considered a road
). It was close, but we just made it to parking.
I heard about this chap who was in such a rush to get down for a pee, he busted airspace and then landed without permission. After he checked in on the subsequent telephone number he was given they let him off due to the unusual circumstances