Join Date: May 2002
Location: Pittsburgh
Programs: MR LT Titanium, AA LT PLT, UA SLV, Avis PreferredPlus, HH Gold, Hertz PC, National Executive, etc.
Posts: 31,647
If you really need something, book it. Don't depend on "based on availability" changes.
I've lso had upgrades appear when I state that I'm willing to change bed types, so any advance upgrades would probably be to a double anyway. You'd really be depending on what's there when you physically arrive.