https://d2k1k1f5tri8mt.cloudfront.net/brochure/2007HurricaneRVBrochure.pdfThis may list your tank capacities. Most have 52-65 gallon fresh water tanks which should be very doable for 5 days with conservation. One model has only 33 gallon tank fresh water tank and you'll have to heavily conserve or fill during the stay.
You can always carry bottled drinking water. Use public restrooms and even showers when possible. Cooking/eating with disposable plates etc to minimize dishwashing (you don't want to be filling sinks to wash dishes). But overall with 52-65 gallons I don't think you'll have a problem with conservation in mind.