In general, esp since it's working with special-needs persons and you having differences can therefore play to strength (maybe with just a little bit of coaching), is to light-medium disclose at the beginning, and then medium-medium disclose if the person can ping-pong it back and forth and actually engage in a positive conversation. Don't go way in and over-disclose as if it's some kind of insta-friendship. it isn't.
for example, if it were me, I might say:
'You know, I share some of the traits of Asperger's Syndrome . . . ' [that's under-disclosing]
' . . . never formally diagnosed, but do share some of the traits . . . '
' . . . and I think it might help me see where some of these kids are coming from . . . '
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Gradulations! Good luck, and enjoy the process.