Disengagement: One Issue or Two

For the record: I don't wear an orange bracelet, I don't wear a blue bracelet, and I certainly don't wear a half-orange/ half-blue bracelet.

There are really two separate issues, which are:
1) Disengagement
2) Evacuation of settlements

Is it possible to distinguish them? Does evacuation make sense without disengagement? Disengagement without evacuation (granted, that seems ludicrous, but if the settlers are prepared to stay and take on the Israeli Army, why wouldn't they be prepared to stay and take on whomever else may try to encroach on 'their' territory)? Which issue is REALLY the issue - the yishuvim or the disengagement? In every conversation I've had, the two issues are conflated - should they be?