If you have a municipal boundary layer of your area of interest or a point at your location, you can do a select by location of all campsite points within 150 miles of your location, inverse it, then delete those points.
I think you meant to post this as a reply to this question? https://community.esri.com/t5/arcgis-storymaps-questions/is-there-a-way-to-delete-points-that-are-mo...
Ahhhh what did I do! Haha, yes thank you.