Have you tried:   https://coolworks.com/jobs-by/category   Traditional workamping jobs are often physically demanding, so if you decide to apply, I would read some blogs about what the work is like.

Temp agencies can provide high paying, short-term jobs.

I have not made the leap to the RV lifestyle yet, in part because I have to find some viable income streams to supplement any work camp opportunities.  Anyhow, I have found some websites that have legit online jobs in all types of categories that include everything from Tech, Legal, Administrative, HR and then I found a couple of other websites that might be lower level but still better than minimum wage.  Just sharing so others who may be interested can check them out.  Some jobs are freelance, others are FT with benefits but ALL of them are online.

Hopefully this helps a few people.

https://www.toptal.com/

https://www.workingnomads.co/jobs

https://www.fancyhands.com/dashboard/#/  

https://www.zirtual.com/jobs

https://join.itutorgroup.com/#/