Good luck! You shouldn't have any issues at DL. My daughter when she was 1, could've passed for 3-5, easily. And, her face from age 1 looked like she was 10. She's almost 10, and has FINALLY grown into that big-girl face
Anyway, DL was great - simply "she's 1, not 5 - that's why she's curled up in the stroller" we had no issues with tickets, entry, fastpasses, rider switch. They were great. At 9-1/2, and as tall as most 16-year olds, I'm anxious about our Oct trip, but I know I shouldn't be.
You mentioned your child was 2, so you probably aren't worried about flying with a lap child. For both our exceptionally tall kids, we ALWAYS, ALWAYS had a birth certificate copy with us for flying. We were asked more than once to show proof of age flying, since we did lap kid. This was back in the day where we almost always were guaranteed an empty seat where we could put our lap child instead of holding the tall little rugrats. Not anymore.