They are charging a premium for just about anything, so it falls to reason that would go high, too. My concern would be over carbon monoxide leaks and heating in that instance. Most RVs have propane heat.
I found it. Looks like it has some decent infrastructure.
http://www.ndindoorrvpark.com/
Each tenant has 2 parking spaces with electrical hookups in front of their overhead door.
The buildings are sectioned into 8 bays for fire protection, carbon monoxide and smoke detection, climate control, air exchanger ventilation, safety and security. The interior walls and ceiling of the buildings are insulated for the year around comfort of the tenants.
Each bay is heated with a hanging electric heater. The insulated buildings will remain cool in the summer, and our ventilation allows tenants to operate their RV air conditioner. The bays are lit with halogen lighting. Standard water, sewer, electric and gas hookups are available for each pad. An exhaust pipe is connected to the RV sewer vent.
For the period of May 1 - October 31: Rental rate is $1,000.00 monthly per RV in bays less than 37 feet, $1,100.00 monthly per RV in bays 37 feet to 39 feet, and $1,200 monthly for bays greater than 39 feet, although Resident shall pay additional rental of $100.00 per month for each adult in excess of two (2) residing in the unit.
For the period of November 1 - April 30: Rental rate is $1,250.00 monthly per RV in bays less than 37 feet, $1,350.00 monthly per RV in bays 37 to 39 feet, and $1,450 monthly for bays greater than 39 feet, although Resident shall pay additional rental of $100.00 per month for each adult in excess of two (2) residing in the unit.