Renting camera equipment -- best way

I'm headed to Antarctica in the new year.
To make sure my trip photography goes without a hitch I'm renting a second camera body.
I plan on renting it from BorrowLenses -- their price seems the best, and they have what I need.

My question is:
* of all the Credit Cards out there - is there any CC that has the most benefits for this: like insurance
* Any other suggestions on where I might rent camera equipment at good prices
* Is there a way I can maximize my points with this rental

Thanks
Jam