@Elizabeth186 If you want to limit your one-night bookings to single nights in between longer bookings, then DO go ahead and set a 2 night minimum as your default. Then, whenever you end up with a single day in between two bookings, you can individually make it available for one-night bookings. To do that, go to your calendar and click on Availability Settings near the upper right. Scroll down until you see the Min/Max Stay fields. Just below that there's a link saying something like "Add a requirement". Click that and fill out the fields for the single date you have in mind.
In addition to doing that, you can also custom-set a 3-day (or more) minimum for date ranges 2, 3, or more months in the future, and then drop it back to your default minimum as the dates get nearer. For example, our default min is 2 nights, but when we first open dates 3 or 4 months in advance, we set that entire block to a 3-night min. After it begins to book up (we tend to book up 50% or more 3 months out), we drop that custom minimum and let the dates use our default 2-night min. We prefer longer bookings, and this helps us get more of them,