"We don't tell them when we move"
LOL. I've got the opposite situation. We're pretty well rooted in place. They move around in a pack, most recently following their mama'nem down to Raleigh. Two hours away, which is OK by me, but give it six months, lol.
Our lower-rent side is in South Carolina, mostly. We were hiding for a while, but it appears most of them are self-sufficient, for now. If my sister-in-law gets divorced again, though, we may have to change our phone number and write "address not found" on the mail!