I wouldn't worry about the camping.
he's proven he's so flaky
he's not going to keep up with any schedule.
letting it get to you is what he wants.
I"d personally 'nice him all the way to the ground'
and be the most
accommodating happy peaceful serene protowoman
ever seen this side of fiction.
then just sit back and watch the show
as he spins himself into ashes.
if they can't get a response
they flip out
and start chewing their own legs off.
Living well can be the best revenge.