Paul has written an interesting piece on jwfacts.com
Anyway, It jogged my memory and reminded me of something I thought I would pass on to you.
Back in the late 80s I had the opportunity to chat with Ray Franz on the phone and I asked him about this very thing.
He didn't say yes or no to Russel's Masonic connection but what he said was something like, "he is buried in the Masonic section of the cemetery so draw your own conclusion."
I assumed that the answer was yes since only those with a Masonic connection can be buried in the Masonic section of the cemetery. My grandparents are interned in such a segregated spot since he was a 32nd degree Mason.
Anyway, I just though I'd pass that on for what it's worth.