Hi Stokey
I am not sure whether this will be much help but a friend of mine was staying at the Holiday Inn International (obviously on the drive) and he said that Dollar had a rental site their , he found this out before he went (with Virgin) but was unable to chage his pick up point (he wanted to use airport transfers) , but if you have'nt booked yet it may be worth a try through someone like choice air who I used ,their price was billriant and with dollar but because I was staying at a villa Int drive was not an option.