for northwest trad and especially alpine a lot of the rock around here has small cracks that are great for small cams. I'd add a #1 and 2 metolius TCU to the rack as those sizes come up everywhere and are not always protectable with small nuts. the 0.5 C4 (which is the same as #3 orange metolious, and yellow alien, roughly) will also be a common piece.
also pick up a handful of nuts, BD #4-12 (or equivalent) is all you need.