Has anyone ever been? What to expect will there be lots of vendors like a mini fishing expo. Ones coming to my home next weekend but there is like little to no advertisement about it.

I found a video made last year.

 

 

I think it varies greatly at each stop.  It seems they've changed things this year where the moderators are now located in a studio (probably Oklahoma or wherever their headquarters is at), similar to BASS Live.  Last season they were on a stage near the event site, often at a Bass Pro Shops.  There was also an event at the same location where some or all of the anglers came after fishing for a check-in of sorts.  This year they're doing a "take out" event after each day, at the boat ramp.  At the Raleigh event last year, there were no vendors since it was by BPS.  I think there might have been vendors at other stops.  No idea this year with the changes.  They will always have some "meet the anglers" and other events located in and around the closest BPS, if possible.