Just an update. I've talked with a few dive shops and as I feared, they were somewhat interested until they heard that they'd have to create a Steem account and it wasn't an instant process. They are pretty content to stick to FB or throw an occasionally picture onto Twitter.
I'll keep trying!
Thanks! I'm realizing that Steemit likely just isn't the right niche or focus area for me right now, so have stopped using it myself. I appreciate you trying :)