My guess is that they'll only be accessible from the front when the park is closed (as Chocolatetown will be open year-round).
So that begs the question, what defines ChocolateTown? From reading, the fountain, carousel, Starbucks, etc, are all considered part of ChocolateTown. Yet, the carousel, fountain, and starbucks are located within the park and the restaurant, ice cream parlor, and retail are accessible from both (just found that out). I guess this is to be answered later, so will the carousel, starbucks, and fountain be open year round?