Of course you can use Camera Connect with an iPad - or at least mine, a mini 4. I've been doing it for about 3 years now. Just requires a separate software configuration on your camera. Your iPhone connection is probably called Set1. Just add Set2. Not easy, but nothing is easy with the Camera Connect app. But I did it, with a lot of persistence.
Or just go to Best Buy or an Apple store and buy a "Lightning Apple iPhone iPad card reader." Simple to use, and flawless. I got mine for about $30 at an Apple store. Best Buy sales them too. Or get a generic one for half the price on eBay (don't know if they are any good, though).
Well, that is your answer. You cannot connect directly to the iPad. Both must connect to the same hotspot, like your phone.
I understand that, but it wouldn't establish a connection between iPad and camera. I am wondering if this is a limitation that only one ios device can connect to one camera.