Not on a Mac, but you should have a bunch of choices as I imagine it works in the same way
So what I would do ....
I'm assuming you have your Mac Air set up as a client with access to the NAS files (or as the media server).
From your laptop, create a new "travel" library (or clone one) from the existing library. You can import your settings if you rebuild it from a library restore and then simply "erase" JUST from the new library the tracks at first. If you do import the settings, make sure you change the options if necessary and reconfigure autoimport.
From the main library, make a playlist. Then select all the tracks and use the COPY functions located under Library Tools, Rename, Move etc. (or use the F6 key) to physically copy the albums you want on the laptop. If you want to do this manually, you can use the Rename tool just to repoint the database to the proper path on the laptop.
You can do this without a playlist of course, and just select albums on the fly. The Rename, Move tool is pretty powerful and you can make a preset so that you can easily reload the info into the dialogue box.