Maybe not the YMCA grounds. I can't imagine why you couldn't park across the road from the resort entry gate at Howmans Gap.
All the winter restrictions tend to go out the window in ski resort during the the summer time.
I'd say you would be within the Falls Creek resort and this is what they say about summer parking -
http://www.fallscreek.com.au/carparking"For the majority of the warmer months (October to June) Falls Creek village is open to vehicles.
When the village is open to vehicles you are able to drive your vehicle into the village (via Falls Creek Rd and Slalom St entrances) and park outside your accommodation or other businesses."