Open source the website and allow members to submit pull requests
Being based in Seattle, the Mountaineers is filled with software engineers, many of whom are chomping at the bit to contribute minor (and major) website changes that would remove some significant pain point or improve the experience. There seems to be a ton of low hanging fruit that could be knocked out fairly quickly by a set of people who are among the best coders in the world.
Obviously, we can't allow anyone to make whatever changes they want, but the model most open source projects use seems reasonable to follow, especially for a non-profit, volunteer run club. That is, make the website frontend and backend code open source, and allow volunteers with expertise in coding to clone it, make code changes, and submit their change to the official maintainers in the form of a pull request. Only the maintainers can review the code and can approve/reject it if it meets quality standards and isn't an objectionable change.
Every open source software project on the planet runs this way and has been used to build some incredible things with no money paid to contributors.
If this idea gains traction, it might make sense to soft test it with a small set of volunteers who are selected for their expertise and willingness to review the existing code and make sure it is safe to actually make public.
Brandon Harker commented
For all the reasons that Jon mentioned it is surprising that The Mountaineers website isn't already open source. The developer talent within the membership is a deep, untapped resource. It would take a lot of work to expose the technical debt of the existing website (not to pick on the Mountaineers website as technical debt is common to any long-running project), but the end result would be a better website with more timely updates at less cost. Win, win, win.