We stay north of Florence as we have family and friends in Florence and Bay Shore. There are a lot of places to visit from Florence north and I would find a closer campground, like South Beach or Beverly Beach near Newport for at least 4 days.
Here are a few things to do;
Things to do on the Coast(North of Winchester Bay);
All the state parks and picnic area/day use areas for beach combing
Winchester Bay for RV Park and County campgrounds, dunes
Florence for the jetties and the dunes, camping
Old Town Florence for Mo’s & BJ’s & shopping, camping
Sea Lion Caves for the view of Heceta Head Light and caves, day use
Cape Perpetua/Devils Churn
Yachats for shopping and views, beach combing, day use, kiting
Waldport for crabbing
Bay Shore for beach combing, kiting
Newport for the Aquarium, Old Town, shopping and the Brewery, kiting
Depot Bay for the Sea Hag
Lincoln City for the Factory Stores and Glass studios south side of town, blow your own glass float.
Otis for the Café, best breakfast on coast that is cooked by someone else
Tillimook for the Cheese factory and ice cream