I've posted this before
You can self park at HRH basically anywhere - left side or right
If you park on right side there is no elevator so you must walk up stairs. For some reason most people park there.
Left (south) side parking lot brings you right next to elevator on lower level (pool level). Only problem is that door may be locked and reuire a room key to open. It is usually not locked.
Was $6/day and I believe it it still is. It is added to your room mandatory, no questions.
Sometimes parking can get tricky especially if HRH is full or if there is a concert in lobby.