Efficiency is mostly irrelevant - unless you're going into the wilderness, you have a gas station within minutes of driving, and unless you are extremely careless, the chance you may end up in a place where you can't drive to a gas station is pretty much non-existent. Gas station locations are available on any phone that has internet connection, which again unless you are into extreme roughing it, is everywhere. I don't remember any time where I needed ever to plan around filling up, unless a) I am driving very long distance for hours (even then it's pretty easy) or b) I need to fill it up before returning the rental (usually there's a gas station right next to the entrance, with a properly inflated price to punish the fools that couldn't plan it in advance, but sometimes you may need to make a detour to get to it). With EV, it looks like much more of a chore.