Hey, Joey! Serious question, here. What is the "just one crowd" that you are seeming to attract? A small group of candidates that are just from the local area that your particular version of Craigslist gets the attention of, or is it something different? Like a certain kind of individual that answers a Craigslist ad, who generally seems to be less than optimal? Thanks for your time.
Also, by way of trying to help answer your question, this forum has a "Job Finder" category and a "Contract Climber Directory" category that can help you to try to reach out to a world-wide audience of climbing arborists. Just in case you haven't tried using those sub-forums just yet. Thanks for posting.
Tim
Edit: Also, here's a link to a section of the climbingarborist.com website that features job offers. Click on the link at the top that says "Post a Job" to create your own job listing. I do not know at this point what the terms and conditions for such a job post are. That is something you'd have to explore.
https://www.climbingarboristjobs.com/