Though I can't help with the TSA question, this topic brings back some funny memories and things you might want to be aware of.

A group of us chartered two sailboats in the BVIs several years ago. There were 15 of us and I think we brought five blenders. We couldn't get the boats to power the blenders so we ended up making margaritas in some unusual places. A grocery store worker on Virgin Gorda let us use their outlets; we used the outlets in some marina restrooms; and we did "borrow" some shore power on the docks once in a while. We could never make them in an anchorage though. I do have a handcrank blender I bought a Restoration Hardware for our own boat, but it's kind of a pain.

Have fun.