Yes - there are Guest Relations areas outside of each park. You need to go thru the security checkpoint, but do not need to go thru the turnstile to go into the park. BLT is very easy walking distance to MK.
If you follow the link in my signature to the disABILITIES FAQs thread, you will find more information about GAC (Guest Assistance Cards) in post #6, iincluding more specifics about where the out of the park Guest Relations locations are for each park.