To me the "less extravagant park" looked like it was the same one, just 20 years or so later, implying that this indeed happened before - in which case the original Chuckie would still be quite the mystery.
Speaking of which, Monkey 2 implied that Guybrush and LeChuck/Chuckie were the only "real" characters. In Return it's now Guybrush and Elaine (and Stan) instead. Maybe Ron swapped LeChuck and Elaine in that role because of the marriage.