"My W is out of the house, does that automatically mean I am LRTing?"
No, of course not! Most people when their spouses move out do the opposite! They keep pursuing them, calling them, keeping their time completely open for them just in case the spouse will see them, sit around depressed, show the spouse how hurt and depressed they are, etc.
LRT is doing the opposite. Getting out, making a busy schedule for yourself, not calling, not being available, acting happy and busy around the spouse, etc.
"should I not answer? This was a sore point from the vacation and I think not answering made her more upset than it did prove a point or anything."
Well like I said before, I think it was a sore point because she is used to being the one being pursued and it did not bode well for her to be the one to feel vulnerable and possibly rejected. Hey, she's the one who left you home on vacation!
Right, don't answer the phone. Shut your cell off so you won't know when or if she's called.
And wait at least a couple of hours to return her call, if not the next day. And get out there and get busy!