Integration Services :: Write Key Value Of Records Processed To SSIS Log?

What's the best way to write key values of records processed in my SSIS 2012 package to the log provider chosen?My SSIS package deactivates widgets as well as thingies.  It was just released into production this week, runs daily, and we'd like to keep a close eye on what it's doing for a couple of weeks, by that I mean on any day be able to quickly see which thingies and widgets were deactivated that morning.  It typically deactivates less than 5 widgets and thingies per day.  

We could dig through the database to see which were deactivated, but that only works if somebody hasn't manually reactivated it since it was deactivated.  We need a log.  This is a temporary watch we're doing, so we don't want to write to a table or make make any significant package changes, such as adding new tasks.It seems like writing the 5-or-so deactivated thingy and widget key values to the log is the best way to watch this package.  What's the most efficient way to do this?  I'm hoping to avoid a new loop and script component with "Dts.Log" calls, but I don't know any other way.