Yeah, it's Thaumaturgy...but you've got Ritual focused on Veils, so that'll work.
Though upon consideration, you might want some items to boost your Ritual Veiling. A point of Refinement could give you an item with +2 Complexity for Veils, which'd take two exchanges to set up...but ony two, and would be of Great Quality. Huh, I hadn't even thought of that before.
So you could throw up a Good quick veil with two shifts put towards duration, and then a Great Thaumaturgical veil in those two exchanges.