I have been to this flea market in the past and and there were a ton of outside vendors but within the last year I have been there a few times and there were very few outside vendors, what has changed?

Yes weathet wad to hot now will better

The weather is the problem, too hot/cold less vendors.

Sunday is the biggest day for flea markets specially on a clear and sunny day when its miserable only vendors there are under the horseshoe at Columbus market

If you go on a Sat. most venders are at Cowtown. Buy I have also seen a drop in outside vendors at all the flea marts.