I've owned and traveled with a Chromebook. Finally gave it away because I also have an 11" MacBook Air which I now travel with instead. Here are some things I've experienced, with a little background info first.
I'm an enthusiastic hobby photographer, and though I don't lug a huge bag full of photo gear on trips abroad, I do travel with at least one mirrorless digital camera and a few lenses. I shoot photos in RAW format, and although I'm working at getting better I still shoot a lot of photos. I don't expect any hotel wifi to have the speed to allow me to upload all those large digital photo files to cloud storage while I'm traveling. I want to back up the photo files from my cameras' SD cards every night so that I have an extra copy of the files that I carry separately (in a pocket or different bag, etc.), in case of damage to or loss of the SD cards/cameras.
I got a Chromebook in early 2013, and really liked it. Light form factor, great screen and keyboard, and with a tiny solid state hard drive. In fact, my camera's SD cards have as much, or more, storage capacity as the Chromebook's hard drive. The Chromebook is not itself a storage device. However, I used the Chromebook on a two week 2015 trip through the UK, both to access the Internet and to back up my photo files. The backup worked this way: the Chromebook has a slot for the camera's SD card. It also has USB ports. I slipped the SD card into the slot and connected an external hard drive to a USB port on the Chromebook. Then I used the Chromebook to copy the photo files from the SD card to the hard drive. You don't need an internet connection to do that, by the way.
I liked traveling with the Chromebook because it was small and light. And, if it got lost, damaged, or stolen, it wouldn't be a huge loss. It had no sensitive info on it, and it wasn't expensive. If I weren't a serious photographer with a need to back up lots of big photo files, I would have left the Chromebook at home and just brought my iPad (and probably a portable bluetooth keyboard) instead.
One of my favorite uses for my iPad mini, is the Kindle app. And one of my favorite uses for the Kindle app, is to have travel guides at hand while traveling, vs. carrying whole books or even photocopied pages. I can also store notes and info on the iPad about travel arrangements, reservations, etc., for easy offline access while on the go.
Cindy, looks like you've got the travel guide problem solved with the iPads. I don't know about your husband's photo backups. I wouldn't assume your hotel wifi will be robust enough to handle uploads of lots of photo files to cloud storage. He may need some kind of hard drive backup, and the Chromebook + small external hard drive would be one solution.