Potato Digging would be a great activity to add to your agritourism business. Very few people have the opportunity to dig potatoes. So many people have no idea that a potato is a root vegetable.
The LSU AgCenter provides an online planting guide that suggests when to plant and harvest potatoes.
If you open your farm to the public, advertise your potato digging day. Invite guests to come and help throw the potatoes in the middle of the row after the tractor disks them from the soil. Let guests sort the potatoes by size and load the potatoes in baskets.
This could be a fun day for people of all ages.
Either charge people for the experience or sell them your harvest.