Surveys and Flex Packages

I am trying to find a way to easily track new and renewing flex package holders (to get around the lack of the subs summary for these patrons).

Right now I am considering the option of using the survey feature.  Does anyone else do this and have any insight or considerations they'd be willing to share?

I am also wondering if I should consider using surveys in TNEW to help patrons self-identify as renewing or new subscribers.  Any thoughts on that too?

--Joe