Increasingly, anglers are becoming aware of the importance of wearing sunscreen. In the “old’’ days of Minnesota fishing — say in the 1960s, when Al and Ron Lindner started making names for themselves here — sunscreen amounted to baseball caps pulled low. Today, the Lindners, among many other anglers, know that protection from the sun and its glare should be primary considerations while on the water. Incidence rates of skin cancer are rising. Sunscreen for use on cloudy and sunny days is a cheap preventative.