Let me just quickly describe the setup I'm using and what situation I have.
This campground is out in the middle of nowhere, where there is no cell signal. I have to resort to the campgrounds provided wifi, which is operated by a local ISP to them. This local ISP charges per device for the season, and its not an inconsiderable amount. To get around this for the past year I have been using a Ubiquiti loco m2 to pick up the campground wifi, bring it into a pfsense router, and rebroadcast this to the campsite we are at. This has been going along fine. We aren't the only ones who do this sort of thing. Now recently, this ISP has caught on to what we are doing, and has kicked us off the network. I can only assume they are looking for MAC addresses that would appear to not be from a wireless device, like a phone or laptop. And by the way, I do have a valid reason for doing this other than cost. The outdoor WiFi they provide is horrid, signal strength wise, so with a mobile device with a small antenna it really just doesn't work well at all.
Now, what I would like to try is putting the loco m2 into router mode, and cloning the MAC address of a cell phone that I have. I was thinking this should prevent them from picking up on the fact that I am using a router, as long as this is what they were doing. It's a small municipal type isp, so I don't think they were doing traffic snooping and looking at TTL's and such. Is there anything the LTT community could recommend to keep me under the radar? I was also considering disconnecting this when I leave the campground, just to try to make it harder to spot. I know this would also mean I have multiple layers of NAT but this shouldn't matter too much for basic tasks.