I used park n cruise in Nov ...... I did not leave my keys ....... not sure where you saw that ... required for the valet service I suppose as how can they bring the car up front for you without the keys? But valet is OPTIONAL ......
and for the record I accidentally left my car UNLOCKED with cash in the car as well as expensive sunglasses
all of which was there when I came back after a week .....
I found that info on a cruiseportcanaveral.com , it had comparisons of all the on and offsite parking, including photos of the lots. The photos of the place showed cars parked bumper to bumper. Guess I’ve got more research to do!