Preferred parking is in the front of Aladdin and Jafar lots. Meaning as close as you can get if you want to WALK in to the TTC(where your Monorail is). But if you are walking to catch the tram, the length is more about how lucky you are to get a spot close to the tram lane as opposed to all the way in the back no matter what lot you are in. Also current construction has this all mixed up.
For 25 dollars Id pay for a Minnie Van to drop me off at the front of MK as opposed to the upcharge for a preferred spot. If you aren't staying onsite or AP that's a 50 dollar parking fee! Yikes.