May 17 is the one day this year when a park entry permit is not required. Free Fishing and Park Entry Day, held annually in Nebraska on the Saturday preceding Memorial Day weekend, means anyone can explore outdoor op - portunities at any Nebraska state park, state recreation area or state historical park. Anglers must observe all fishing regulations. Camping, lodging and all other user fees still apply at state park areas. Entrance fees for museums at state historical parks and the entrance fee at the Schramm Education Center remain in effect. Activities are planned at several parks for May 17.