Has anyone tried a walk up Golden Hour Portraits photo shoot?

I am a complete amateur photographer, and only shoot 35mm film. I want to practice shooting portraits but my wife is tired of me pointing the camera at her all the time. I had an idea of going to a local park, scouting out a good spot with decent lighting and through traffic and seeing if people would want to do an impromptu photoshoot.

Equipment I have

• Canon T70 (loaded with Kodak Gold 200 Color Film)
  • Vitivar flash (1/90 sync speed)
  • 35-70mm F2.8 to F4
  • 70-200 F3.5
• Minolta XG-M (loaded with Kentmere 400 - BW Film)
  • 28mm F2.8 (unlikely to use)
  • 50mm F2
  • 135mm F3.5
• Sirui Tripod

Marketing:

• A poster stating: Walk Up Film Portraits at Golden Hour - Tips appreciated*
• *Photos will be delivered by end of weekend, will require development, scanning, editing*
• I'll bring my dog and leash her nearby since that often gets people to want to talk to me regardless

Discussion points:

• Making sure I'm allowed to do this
• Tips or set a price per photo - I self develop and scan and edit so the only material cost is the film (10 dollars a roll for color, 5 ish for BW due to bulk rolling)
• Is this a terrible idea?