Also note that dealing with family photos on iCloud might be a pain/impossible. I spent time trying to figure out a good way to pool our photos from multiple de

Also note that dealing with family photos on iCloud might be a pain/impossible. I spent time trying to figure out a good way to pool our photos from multiple devices, but ended up settling on using Dropbox and Carousel. There were some hacky work-arounds to have multiple Apple IDs logged in per phone (one for apps, one for iCloud), but I couldn't find any information on something like selective sync for our laptops and iCloud drive. Between Carousel for automatic uploads from phones, being able to view all of our photos easily via the web from our laptops, and being able to exclude full-res files from our machines via selective sync, I think it is the most robust option right now. If anyone has details about being able to share full iCloud photo libraries, I'd be interested to hear.