The Waterdown Car Show &Swap Meet is usually a good show, especially if the sun is shining. The Swap Meet usually takes about 3 hrs. to walk through and then the car show to view. The nice thing about the car show is you get a totally different group of cars on day 2.

I use to frequent most of the swap meets 10-15 years ago and always found Waterdown to be a descent meet/show, bit of a coin toss as what you would find in the venders area. As Chris said, if the sun is out, there's a steady stream of cars/peeps heading into the show.
Ancaster has been a large/quality meet, vast array of parts you just don't find. I gathered up some buddies for a early morning start to a meet there, we showed up and the only signs of life where the birds flying around. I was sure I had the date right, but I was also assured I would be buying breakfast.
Jmo and definitely dated opinion. All these events have moved to larger venues as you probably know.
I've never made an effort to make it to Bothwell, but sounds like a popular meet from what I've heard over the years.

The Pontiac show in Norwalk would be something to check out for sure. I attended a Super Chevy Show years back, there was over 300 cars just to get down the track. I bet there would be some rare and cool built Ponchos out from under there covers.

Does it cost anything to get in?

Thanks guys for the info. When is the next Ancaster swap meet?