George C1 and Mr. EZgoin are right on the money, and I do the same thing. I declare EVERYTHING (even my two packs of cigarettes) and I even bring grocery receipts if it's feasible (one shopping run the day before my departure to purchase what I'll be bringing down with me). On one occasion I got charged a few dollars, but that was the only time and it was early on in my numerous trips here since buying my property.

My advice: NEVER lie on a government form, because it's absolutely not worth the trouble you'll end up with if someone wants to make an example out you.