I've added a 12 volt jumpstarter to both cars. Imagine your chagrin if you had one of those but it was inaccessible due to power loss.
That would not have been fun ... I likely could have got at it but not without some serious effort. I definitely would have been looking for help before trying to unpack/dig through to it.
Actually, this situation has me thinking about picking up one of those portable jump starters for this vehicle; a couple days earlier we were the only people in this campground.