I wish I had that info, but try contacting a recruiter or asking a Guardsmen on the IMF, as far which units deploy, check with the Armed Forces Press Service or DOD News. They usually have the units deplyoment dates published a little ahead of time for families. You can google either, but what's going on in Afghanistan also plays a large role, keeping and eye of the President's war policies you'll see that when large influxes in operations are planned, more troops (including gaurdsmen) deploy.
Try locating a better resource than me however, like I said, what I know is limited.
"This conjunction of an immense military establishment and a large arms industry is new in the American experience"- Dwight D. Eisenhower , Jan 17,1961.