Hey i go Florida every year and i have found that the best place to rent a car is Alamo Car rental services. We use them mostly. try looking at their website and see what you think. You need to have your driving lisence and a credit card and the prepaid voucher that they will send you throught the post, unless you are paying upfront that day. I hope you have a lovely holiday, as i know it is amazing in Florida!Here is a website that gives you tips on what to do in Ganesville Florida, maybe you can find something fun to do with your sister! http://www.10best.com/Gainesville,FL/
I suggest that if you can plan ahead you chould book the car hire in advance before you set off, it will save you money. Try the following link to a comparison site. Getting the car from a downtown site rather than the airport is generally cheaper too. Pre buy your insurance when booking as this will be cheaper than on the day. Resist the blandishments of the sales person to top up insurance. That is how they make up their pay, from commission.http://www.travelsupermarket.com/?SOURCE��
Use the car rental code on http://www.thriftycarrentalcodes.com/You ll need a drivers license and a credit card when you pick up car.None needed when you make reservation.