Just some FYI:
1. You should always carry your ins. card copy if you are not driving your personal vehicle- some states, like GA, keep ins. info in a computer base but it doesn't mean it can't be wrong or transferrable to another state. If something should happen, then you are protected by your medical limits as well as personal coverage.
2. Though the counter person was strongarming the friend mentioned, a lot of people do not understand their ins. policies and what it will cover- for example, if you drive a compact car and you rent an SUV, your ins. might only cover up to the amount your car is worth, meaning you could be owing a lot of money should the SUV be totalled. Also, you might very well not have rental car coverage at all, meaning if you rent a vehicle and wreck it, you are on the hook for the whole shebang.
3. Many states have no-fault ins. coverage, but FLA I don't believe is that- so if you have no-fault and the other driver does not, you could be held liable for all the damages and a fine to your ins.
4. Deductibles are varied- if the accident is $2000-and your deductible is $1000- you still have to pay the $1000 based on your policy coverage.
5. Some places call it a Roadside Assistance fee, others call it a convenience fee- you are still paying it somewhere in your contract.
I am NOT promoting buying the ins. by any means but you need to know your limits- always discuss with your ins. agent or customer service line. If you need the coverage, at least get liability to cover your fanny. If not, just keep your card with you and a claim # line so you can do any necessary actions and put it behind you to enjoy your trip!