Campground-specific questions on The Dyrt Alerts

• I received a Dyrt Alert but the park requires multiple nights to book the site I want. Why did I get that Alert?
• What if I want to scan a campground that's not available on the list offered?
• Do all my chosen campgrounds have to be in the same area for a single Dyrt Alert scan? What if I want to scan 2 campgrounds that aren't near one another?
• Do I have to choose more than one campground to start a Dyrt Alert scan?
• Are all campgrounds on The Dyrt eligible for Dyrt Alerts?