As far as getting a significant other into the overlanding life, make sure your trips are not all about you. Take her on shorter trips to start and make sure you always incorporate things she likes into the trips. If she wants a hotel night for every 2-3 nights in a tent then do it; trust me, it's worth doing. If you will be going anywhere near a site/landmark/store/whatever that she really wants to go to, then go to it. It doesn't take up that much time out of the trip. If she enjoys the things you are doing, and you are incorperating things that she likes (even if they are not outdoorsy) then she will at the very least not mind overlanding.