I haven't heard any more mice in my walls. I've caught three - two in the crawlspace and one in the access hatch to the jacuzzi tub. I think the crawlspace ones were the ones getting in the wall.
I used the plastic victor traps with peanut butter. Interestingly, after I caught the two in the crawlspace, I reset the trap and the next day all the peanut butter was gone but the trap was unsprung. I put a new trap down there but so far it is unsprung with the peanut butter still there.