What does a family do for charging and storage of multiple Apple devices?
I find the cables die pretty frequently. The kids always get them knotted, or stress them. So, I buy a lot of cheap ones. Something like these. At $4 for 5 I tend to buy 15-20 a time. Takes months to run through them and I don't fret about it. We have a huge stock of the actual little bricks from the many iPhones we've had.

I've also seen a lot of interesting little projects for charging and cable management:


DIY Charging Cell Phone Holder
Desk Phone Charger Holder


The neatest/simplest being:


Neatly Organize USB Cables and Charging Cords on your Desk


Also several items like this on the market:


Bamboo Charging Station


And finally, I'm putting these by the bed so my phone can charge over night:


U-Socket USB Wallplug