Guests kept moving our firepit, too, to shake-your-head places like directly under the treehouse, into the field, and onto the path. It's part of the new All Locals All The Time phenomenon. Not every one, of course, but enough so that this fall we took away the tripod grill stand and twisted into the ground a heavy piece of corrugated iron onto which they can put the grill. At least now it will be a great deal of work to move it.
They do love it. It's part of the whole camping thing. I could never take away their campfire.
The one small thing that changed everything here, @Laura2592 , was installing a solar light over the bed. No electricity in the treehouse, and guests went through batteries at an earth-unfriendly rate. No more batteries!