Well, I hope it was enjoyable for you...despite the heat.   

I live in Charlotte, so the museum is the closest 'train place' to me.  My dad used to take me when I was a child (I'm 21 now) and now I try to go at least a few times a year.  I always enjoy it when I make the trip and have developed a strong interest in the site and it's history over the years.  I recently purchased one of the HO  Spectrum decapods (undecorated, dcc/sound) and plan on modifying it to model the SAL 2-10-0 #544 at Spencer.  The Spencer/BC&G #604 will be next up using a Spectrum consolidation.  Are you nearby as well?

I enjoyed the Rail Days event at Spencer as well.  The engine in the photograph, however, is actually SR #542 with the #604's tender.  They put it together like this for the movie Leatherheads a few years ago either due to lack of money to completely restore the 604 at the time or due to time restraints, I cant remember.  But the 542s actual tender is in the Roundhouse and so is the real 604s cab.  I believe I saw the actual (ex-BC&G unit) 604s boiler and wheels through the window in the backshop, so hopefully that's a good sign that it's at least back at the site.  #604 used to be operational and the highlight of the museum.  As pointed out, however, the photographed #542 engine is only semi-cosmetically restored and is no where close to being operational.