Well, I just answered my own question and since I didn't find it in the community, I think I'll share it!
Go to your "Calendar"
Under "Availability Settings", click on "Reservation Preferences"
Under the "Minimum and Maximum Stay" you will see a choice of "Add Another Requirement"
Click on that and in the boxes you can choose "Specific Dates", input the dates you want to offer for say, a two night minimum, (all my other bookings have to be a minimum of three nights)
And wouldn't you know it, it actually works. I now have offered a two night minimum on two specific weekends that are empty in July. I'd rather have guests for two night than for no nights! 🙂
Cross your fingers that when guests are searching looking only for a two night stay, they will find me.
Hope this is helpful to others...
Stacey 🙂