I think the critical part of how I'd reply is what do we mean by "long term"? Longer than three weeks? Three months? A year plus?

At three months, it is pretty much a relocation- you are either working for your old boss at a new site or needing a new gig, and/or are in temporary housing. At a year, it is certainly a relocation. Relocation, at least to me, is what you do after the bugging, the bug out itself is a short term thing designed to get you clear of the danger and reorganized. So to my mind, a "long term bugging out" becomes a contradiction in terms. *shrugs*

YMMV.