Manassas Railfanning

Hello,
I'm going to be in MSS on a wedding trip to DC, but it would be in the morning. No access to a car. I'll be coming there on the reverse peak VRE and departing on 176. Where are the good railfan spots in downtown? Would I see any freights between 7:50 and 10:25 a.m. thanks.

Well for starters the VRE/Amtrak station is right on the tracks and plenty of crossings for good amounts of horn if you're into that!

Davis