You are correct  because the legislature exempted itself from the state open meeting law in AS 44.62.310.

The bottom line is found in the definitions section under #3: "(3) "public entity" means an entity of the state or of a political subdivision of the state including an agency, a board or commission, the University of Alaska, a public authority or corporation, a municipality, a school district, and other governmental units of the state or a political subdivision of the state; (IT DOES NOT INCLUDE THE COURT SYSTEM OR THE LEGISLATIVE BRANCH OF STATE GOVERNMENT) (emphasis added). 

Here is the link to AS 44.62.310 where the exemptions to the statute are listed.  I can't find what you describe as a "deliberative privilege:   http://touchngo.com/lglcntr/akstats/Statutes/Title44/Chapter62/Section310.htm