If you are looking to 'hang' with other RNAC's, the site you are interested in is: http://www.aanac.org/
It is the site of the American Association of Nursing Assessment
Coordinators. The site is an excellent resource. Have you thought about becoming certified as an RNAC?
I used to work as an RNAC, so I know your frustrations about MDS completion. If I were you I would be sure your DON and your NHA know about your work load.... with the new attestation on the MDS 2.0, you must be sure your work is 100% accurate, or you, personally may be held liable for your answers.