The VFCC page has driving directions that consist of a link to Mapquest and a street address.
Actual directions off the top of my head:
Take 95 in either direction to 476 North.
476 North to 76 West (Valley Forge).
76 West to the King of Prussia exit (stay all the way right; it splits a couple of times and there is a ton of construction).
The KoP exit drops you on 202 North. Get *immediately* to the leftmost lane and make the first left (huge intersection, mall on the left, restaurants/motels on the right). That's Gulph Road.
Go straight through several lights. You'll go past the mall (on your right) and the golf course (on your left). Getting close you'll see a light with a restaurant on the left and an underpass directly ahead. Go through that light and the next one. The next intersection has the Valley Forge Convention Center sign across the street on the right. You can either turn right and then left into the parking lot, or go through the intersection and turn right into the lot.
Be advised that the convention center is packed when gun shows are in town. The meek may inherit the Earth, but the parking lot is an exercise in social Darwinism.
If you miss the left turn at Gulph Road (happens a lot on the weekends due to extremely heavy traffic at the KoP exit), stay straight on 202 North, go through a couple of lights and turn left on Annendale Road (there's a bank on the left corner and a boarded-up McDonald's on the right). Go past the mall (left), the church (left), and several houses (right). Turn left on First Avenue. Go through two lights, the convention center is at the end of the street on the right.
From the PA turnpike, there's a King of Prussia or Valley Forge exit (I forget which). Go through the toll and take that first ramp on the right. It puts you right on Gulph Road at the golf course, just stay straight and follow the other directions.
HTH,
jafager