I was just thinking about this myself.
I leave Monday to go to my sister's house for 10 days or so. I've decided, at the risk of boarding the bus to Crazy-ville, to bring my scale with me (I'm driving, so space isn't an issue).
I haven't gone to this extreme before, but I actually weigh daily, only recording my weight once a week, and my sister has NO scale. I really don't want to be without a scale at all for that length of time. ESPECIALLY with the insane number of food temptations I'll be facing, as well.
In addition, I'm really close to my next goal benchmark, and it only counts on the same scale I've been using all along.
A little OCD? Probably? Helpful at this stage of the game? Definitely.