Hi Adorer and welcome to the board.
The southern spring and summer are the best seasons to go, October to February/March. You don't want to be rounding Cape Horn in the winter months if you can avoid it!
Try contacting our travel partners using this form
filling in your destination and explaining in the comments box, what you want, they cover more than just Antarctica.
This is not just
a plug as I do rate them very highly, but I admit it is a plug too :grin: