I've done many crosses with multiprop of my own (imaginary or historical), old fashion way. Including one real-time West-East via the North Road with a MD312 (was achieved IRL, once), and several direct come-and-go with our B17 (that's is REALLY challenging because of fuel load) I could write a whole book on this subject - as long as we speak of piloting. If you are not a FMS-GPS maniac, that's really a great adventure. If you are, it's only a 10hours electricity bill over endless water, you set up your start during your morning coffe, and witness landing when you're bacj home after work. It has absolutely no interest at all with a modern plane. Times are exact (the xplane world is actually spherical) and orthodromy is definitely reliable. With a map, a ruler, a timer, and a lot of calculations, it's pure art of piloting.