Anne and I went to the Kona coast of Hawaii for the July '91 eclipse. My rig was a Celestron C90 and my Pentax SLR with 500 mm lens, with Thousand Oaks filters on both. The night before the eclipse, the trade winds shifted, and we awoke for the early morning eclipse to scattered clouds and high humidity. As the eclipse approached 95%, the temp dropped noticeably, and a solid layer of clouds formed in minutes. We could see the eclipse shadow race across the cloud deck, but our only view of totality was a TV turned on in the room behind us. As soon as totality passed and the air warmed, the clouds disappeared.
Needless to say, I was NOT a happy camper!
Don't know if I will go with anything except my welders glass and own two eyes, this time...