Reserve parking in advance near your destination. Compare garages and lots and lock in a spot.
For medical equipment (CPAP machines, humidifiers, etc.): Distilled water may be difficult to find in some regions. Check major pharmacies and supermarkets. In emergencies, bottled water with low mineral content can be used short term, but consult equipment manufacturer guidelines. In the United States, distilled water is widely available in supermarkets, pharmacies, and big box retailers such as Walmart.