I think I now have 4 or 5 camera bags/backpack type bags. Perhaps you will find as many of us did that you will start with 1 bag you think you will like and then move on to another and so on depending upon the situations you use your camera in.
Take my list here knowing my needs and cameras (listed below). I travel by car and plane with my laptop and camp sometimes and often hike, sometimes in rough terrain.
I have a couple fanny pack style bags which work surprisingly well even with my dSLR and one or two lenses so don't rule those out if they appeal to you or your spouse. Look at the
Kata line. I owned a similar one and still use it.
For a combo shoulder and fanny pack that doesn't look like a fanny pack
Mountainsmith makes a good pack that holds everything a family would need for a day plus all your camera gear. I use it for day hiking and even hook a tripod to it.
I also have a Lowepro SlingShot 200 AW. This is a great bag but I found it somewhat uncomfortable riding on only one shoulder for more than a hour or so. It was easy to swing it around and pull my camera out etc. and I even fit two extra lenses and some snacks etc. in as well as my wallet and a small water bottle.
But I recently discovered the
Dakine line of bags; several of which have features I really like such as built in all-weather, attached covers that pull-over the bag and a camera-bag within the pack itself that you can detach and carry separately if you wish; and a built in tripod holder. And the one I just bought will be my carry-on the plane to Canada this fall with my laptop and all my camera gear. I can then hike all day with it when I get there.
But the best advice I can give for camera bag buying is go to a camera store and try on different camera bags. With the sling-type try moving it around to see how it feels. I think it's all about comfort and convenience.
If you have a type of bag you like taking to the parks now, find a similar camera bag.