Well, it hasn't been as bad as I've feared.
Bridget hasn't felt gypped or anything that her elf doesn't toilet paper our house or make big messes around the place in the middle of the night. Apparently, she's OK with the fact that he is a NICE elf. All he does is re-appear each morning is some silly place, and she has to find him.
She DID wonder why he doesn't get mischevious.... I simply said "Look around this place! He obviously thinks that about TEN elves have been here already, messing things up!" Seriously... I mean, if he DID make a mess, how would I tell it from the general mess?
And, at least I know where to find him each night. Tucked safely in his little bed, right by Bridget's bed.