You could make an English style pale ale, or American pale ale, or an American amber.
Willamette is funny to me, because it's an American hop but with English parentage, so you could go either way with it.
I'd use light DME, the crystal and carapils, and hop with 2.00 ounces of willamette at 60 minutes, .50 at 15 minutes, and .5 ounce at flame out. English yeast at 70 degrees if you want a fruity English note, American yeast at 66 degrees for a clean "neutral" taste.
.5 pound crystal (what color do you have? If it's light, you could do a pale ale, if it's darker, you could make an amber)
.5 pound carapils
6 pounds DME
2 ounces willamette 60 minutes
.5 ounce willamette 15 minutes
.5 ounce willamette 0
It's a little light on flavor/aroma additions with only a total of three ounces, but it'll do nicely!