I've read some bad reviews about parking here; I feel for those who went through the wringer but our experience was just the opposite.
Long story short, after Google Mapping a few dead ends and wrong turns we found the numerous airport parking options. We choose the outside $7 a day option. We found a spot about 40 feet from the ticket booth, went away for 5 days, returned, paid our $35 and left. It wasn't far from the check-in and the vehicle was as we left it.
Not frequent flyers are we, but parking here again just became a favorable option. My advice? Consider the $7 parking!