I often use an Amish made staw hat. Light weight, super wide brim and holds up rain or shine. Paid less than $20 from the Amish family making them in Gordonville PA. Stay away from the tourist hats though, not Amish made and flimsy. There real thing is a study in durability.
Might not be too hard to find near Port Tobacco MD either as there is a large Amish community in Southern MD.
Rif