In California, "on-street" parking is limited to 72 hours for ANY vehicle on ANY street or highway. And California cities can't restrict on-street parking for RV's unless they also restrict all other vehicles in the same manner. Cities that have tried, have been forced to rescind those efforts.
According to the California State Attorney General, SAG Opinion 89-602:
QUESTION:
Does a California city have the authority to prohibit the parking of particular categories of vehicles, such as recreational vehicles or motor vehicles which exceed a specified length or width, on its residential streets during all or certain hours of the day?
CONCLUSION:
A California city has no authority to prohibit the parking of particular categories of vehicles on its residential streets during all or certain hours of the day, with the exception of commercial vehicles having a manufacturer's gross vehicle weight rating of 10,000 pounds or more.
It would be worth investigating to see if there is a similar statute in the state of New York.