I would suggest using the first trip as a reconnaissance trip, and to get your meter. Their pricing floats up and down a lot on most items, depending on what specials and coupons are available. You will probably want to get signed up on their e-mail list to get coupons (almost daily.) This will let you know when their in-store pricing is just too high for what the thing is.
You can usually find a 20% off of a single item on their website or in various magazine ads as well. Some of the stuff is total junk, some not so bad. If you are spending much on an item, it is good to look the floor model over carefully to see if the design will do what you want. I have passed on their bench top 12 speed drill press that usually get's discounted down to $49.99 with a coupon, because you can grab the chuck and rattle it in the bearing on most of them. The higher dollar floor standing units have a little less slop in them, so might be ok.
Some of their hand tools and air tools are a deal. Their impact sockets are exceedingly cheap, but I have not been able to bust one, yet, at least. I actually like a few of their ratchet designs, even though my tool box full of Snap-on tools are offended when I add an HF tool in.
Your mileage will vary, as they say. For stuff you use infrequently, not to make a living with, the HF stuff can get the job done. Most of it is not great quality, but some of it is "good enough."
My son just bought their "hardwood" oak workbench for $129.00 to use with his re-loading press. It really is pretty decent for the price. I'm tempted to get one sometime.
I picked up their Laser guided IR thermometer for under $20 a while back. Seems to work reasonably well.
Enjoy the show!