Van- and RV-dwellers have some advantages regarding employment:

• you can go where the work is
• you can live on less income

Workamping at parks and other camping locations may be the most famous work opportunity for 'dwellers.

With the advent of Covid, many tech-type jobs have become remote and can theoretically be done from anywhere as long as you can maintain a good internet connection. However, for the most part these are career-type jobs that will require a good deal of experience before you can go fully remote, and if you have already gotten to that level in your career you likely don't need to read this wiki about how to get a remote job.

Typical careers that have good remote potential are Software Development, Proofreader (it's still a thing these days in specialized fields), medical transcription, many avenues of IT.