I have seen CM that are very understanding of kids that are tall enough but too scared to ride and then I have seen them give a farm no on rider swap. I was in line for FOP when this little one eas scared other guests were begging the CM to give the family a rider swap pass she was so scared to go in the pre-show room all she did was scream and when I say scream I mean scream her mom was trying her best to tell her she was not going to ride. I do get why they only let kids under the hight to skip it, but when a child is so scared even after they expand to her she is not going to ride and they are so scared a CM comes in the room to see what was going on there is something wrong with that.
OP if your son is tall enough to ride I would not plane on getting a
DAS return time.