Crosswind
You picked a bad day! The best day to visit NW is a Sunday when there is no market (an no queues.)
There often is a P51 on the field, but usually well hangared.
You'll probably see a TBM3R (Avenger) which is usually out and about and of course a number of JPs and some L29/39.
However, NW isn't a museum - its a working airfield so a/c come an go all the time.