This was my introduction to Russ Meyer. I saw it in 1968 or 1969. Erica Gavin was the vixen who committed every act of masfeasance, misfeasance and non-feasance that you could imagine. This romper takes place in the Canadian north woods and vixen gets involved in racism, Communism, and other ism of the time. Great fun.
I found a website http://www.girlsgunsandghouls.com/ that is worth your time. It has a great Vixen! review.
The movie site has a great quote that I must leave with you:
"You've got to hand it to Russ Meyer. One minute we're watching a virtually plotless sex romp, the next minute we're involved in a tense hijack with communism versus capitalism diatribes coming from all sides. It's a magical transformation really, yet it all fits together and if you're familiar with the Meyer approach, it's not a surprise. "