If you don’t want the iPads to be locked down entirely with just the one app, you can opt for the multi-app kiosk mode which is basically disabling all the apps you don’t want the user to have access to. The Settings app will be accessible in the multi mode, though.
If you plan on locking down the iPads to a website or web app, you might want to take a look at this help too.
If you want to activate Kiosk mode on quite a few number of iPads, you should consider creating a group with all the devices. Then, you can just assign the Kiosk policy to the group to enable Kiosk mode on all of them.
Thanks and regards
Hexnode Support Team
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Hexnode | Mitsogo Inc.