The problem with a CNG, propane, or gasoline portable generator is that they won't run off the diesel fuel in your expedition truck's tank and therefore require you to bring and refill multiple fuel types.
Originally Posted by ande21
For a home backup power setup, I'd run it off natural gas or propane depending on what's available. For local portable use or if your truck runs on gasoline, use gasoline but that's outside the scope of this thread.
It's better to regret the things you've done, than the things you haven't.