U2, regarding liability insurance, that will vary depending on the state you rent the car in. In most states the owner of a vehicle HAS to carry liability insurance and in many of those states, the amount of coverage they have to carry is a large sum...at least $100,000. However, that is not the case in Florida. Florida does not require anyone to purchase Bodily Injury Liability coverage, only Property Damage Liability coverage of $10,000. In addition,
Florida law allows rental car companies to shift primary liability coverage to the renter's insurance. It has to be in bold face type on the front of the rental contract and you have to put your initials next to the language shifting responsibility.
If you're from outside the U.S. (except Canada) you probably should buy Supplemental Liability coverage unless you have purchased coverage elsewhere before you arrive, that covers you in the United States.
I don't believe buying Liability coverage would effect your credit card's Collision coverage. Read the brochure they faxed you, but I believe it will say you have to decline CDW on the contract. It shouldn't matter to them if you purchase coverage besides CDW.
BobK/Orlando