reporting server always on grpup with reporting server tempdb

hi,

i am looking at putting sql reporting services on sql 2012 using aoag.  when i add the report server db that works fine but the report server temp db is in simple mode so i cant add it.  

is it best practice to leave this database as simple or change to full and add to the aoag.  if its not added to the aoag what are the implications of a server failure and the reporting server database located on the other server where the tempdb is to not synchronized with.

Thanks

phill