I've been asked to ferry a Cherokee 6 from the mainland to Hawaii. I know it's done. I found a company in Las Vegas who will install the tanks and take care of all the paperwork as well as provide a class on the flight. Otherwise, I'm still collecting information needed to make the decision on whether or not this makes sense. The idea of 16 hours over water in a single gets your attention. If anybody out there has made this flight (or previously knew anyone that made half of it) please share any information which you think might be valuable.