Booking requests and waitlists are the clearest fit. An operations system can read every inquiry that comes in by email or form, check it against your actual site calendar, reply with what's open and the rate, and hold or confirm the spot without you touching it. When a site frees up from a cancellation, the same system can work down your waitlist in order and notify the next family fast enough that you don't lose the booking to slow response time. If you're still tracking availability in a spreadsheet or a notebook, the honest answer is that this needs real booking software underneath it first, a proper web app with payments and multi-site availability, and that's a separate build before the automation on top makes sense.
Arrival instructions are close to fully automatable: gate codes, check-in windows, directions, RV length or hookup notes, quiet hours, all sent on a schedule tied to each guest's actual arrival date, so nobody has to remember to do it per booking. Review responses can be drafted for every review as it comes in, matching your tone and referencing the specific stay. Straightforward ones, a thank-you, a simple logistics note, can go out on their own. Anything with a refund request, a safety complaint, or real anger in it should sit in a queue for you to read and send yourself. That line is deliberate: a fast generic reply to an angry guest usually makes things worse, not better.
Repeat-guest marketing is a content and outreach job: track who stayed and when, build the list from that instead of a manual export, and write and send seasonal emails (opening dates, return offers, off-season reminders) without you drafting each one by hand. What it can't own: anything that happens on the ground, a downed tree, a broken water line, a dispute over a damaged site, any call involving a real refund exception, and any guest interaction that's really about calming a person down rather than answering a question. Those stay with you. The system's job is to clear out the repeatable messaging and scheduling work so those are the only calls left for you to make.