One problem is that the parking is too far from the gate. Another is that rather than designate the first two spaces or so at the ends of the rows as handicapped, they put in a section. So you could be at the end of a row and have to hike up to the spot where you catch the tram.
And at the MK, it is ridiculous.
You can explain to them that you have crutches and ask to be parked at the front of the row...but those parking people can be very unsympathetic...and rude. If they don't let you, and you do it anyway, they even come over and yell at you.