Anyhow, one of the people I was there to work with brought me over to Bletchley Park and to the museum. It was easy to spend the full day there between the two.
So, even if you don't live there, I recommend visiting even if you're more than an hour away. I seem to recall the drive taking about an hour and a half, though my memory may be fuzzy. I was there in 2007 and I think they'd just recently opened.
If I'm back in the area, I'll be sure to visit again.