Generate a private link for any renter and send it however you already talk to them. They open their own account: the site they are on, what they are paid through, how many months it is behind and what those months come to, an installment schedule if they have one, and a dated history of the charges and payments on the account. Once you have switched card payments on, that page also carries a button through to your payment form with the amount already filled in, paid by card, or by bank transfer where your Stripe account offers it. A camper who is already paid up sees the other side of that page instead: next month’s figure and a count of one to twenty-four months, so the guest who would rather settle the season in one go can. Their browser sends the number of months and nothing else; the amount is worked out on your side at that site’s real monthly figure, and the secure payment page confirms it before anything is charged. Turn autopay on as well and this same page is where a camper sets that up. The link lasts: it still opens months later, and handing out a second one leaves the first one working, so the text you sent in May is not dead in September. No account to create, no app, no password for them to lose, because the link itself is the key, and one action cancels every link an account has whenever you want that. It shows a first name, a site, and money. Not a phone number, address, or your notes. And it cannot reserve anything: the page reports what is owed, and paying, where you offer it, happens on its own secure page.