The antenna is up, I'm checking it out before connecting it to the radio. I went with a 20m inverted-V (wire antenna) with its apex held by the Buddipole mast. You can barely see the wires, that's the RG-58 coax (feedline) in my hand. The thin wire will have less wind loading so it should require less guying than a Buddipole antenna sitting at the top. And, it is the very same antenna (sans the mast) that I took on my IOTA DXpedition to SV8 Santorini (EU-067) back in 2000, so I'm feeling lucky. ;-)
The mast isn't fully extended so the apex is only up about 12-14 feet. That's normally too low for a horizontal or inverted-V antenna when you want to work stations far away, but since the terrain falls off sharply just a few feet from the antenna, that helps a lot. It worked well and I ended up working stations on the U.S. and Canadian east coasts without a problem.