I import onto two external drives and back up everything, including computer, with crashplan. I did the switch out drive for a while, stored it at my wife's work, but stopped doing that. I trust crashplan. With amazon prime you also get unlimited storage for photos and videos on their servers, and amazon is not going anywhere anytime soon. And I'd guess they have backups of all those things, not just one drive with one copy.
I've looked into Raid and all that stuff several times, too cumbersome and if the house burns down or gets robbed it's worthless. I only do the double drive at home since it's so cheap to do. And once before I did that I had a drive die before I could back it up to the offsite one, lost only a bit over 100 photos from a hike, but nice photos. Still ticks me off. I like that I don't ever have to think about it anymore, CP works in the background by itself, I can't forget to make a backup or switch out a drive.
If you are a prime member, there's really no reason not to use the free storage somehow IMO