There's really no words that can encompass the volume of work and the dedication Neil put in. Neil did his work by hand, every one of his airports was worked over by him personally, there was no automation. I worked with Neil a fair amount during region development, he cared deeply about his creations. Every model I provided him, he expressed gratitude for the effort and that he could use it to create a better airport for our customers.
We had a lot of email exchanges and Skype calls along the way, Neil was a caring and thoughtful man, he spoke about his family often. A little bit I knew about him, Neil was also an amateur radio operator, he talked to me about this a couple times, he had worked at a radio station for a while and maintained his license. I went and found his license, his call sign was K7NH. Another fun piece of info I found while searching, Neil was interviewed by a local paper in September and had his photo taken while walking on a trail: https://www.heraldnet.com/news/links-no-longer-missing-along-interurban-trail-in-lynnwood/
Neil was modest about his work and didn't bask in the spotlight, but he set a new standard and created an impressive legacy. It has been said a couple times already, but Neil's work is unparalleled and by the sheer reach of it, Neil should be remembered as one of the all-time greats. Rest in peace, Neil.