Always worth going to, deals can be found, you will see guns there you never see anywhere else, wear good shoes, be prepared for crowds, spend all day both days, bring something along to make notes on the location of whatever you like, and take lots of money.
Comfortable shoes, note pad or smart phone, a light backpack with a couple bottles of water and snacks if you plan to stay all day. Vendor food is really pricey. Every time I sat in the dining area to rest I've struck up an interesting conversation with someone from a different part of the U.S.