Oregon Coast - what to see?

I will be on the oregon coast for 2-3 weeks July 4-24. I will be traveling south to north. I have noted "full"days, since these sites are fairly close, I will be leaving before check out and arriving right at check-in and will have that partial day (not noted below).
Mills Casino, North Bend 1 day
florence Thousand Trails 2 days
newport Thousand Trails 3 days
pacific city Thousand Trails2 days
seaside Thousand Trails 3 days
Portland/Columbia River, unknown park 3-4 days

I would like some suggestions as must see/do's. I've got all the travel books, and info from Oregon Coast State Info... there is so much to see and do. Would like some been-there-done-that info.

I do plan on the Aquarium in Newport, and shucks I don't have my paperwork.. but there is a boat trip of the bay/river etc. think Florence? Tillamook Cheese Factory, Lewis & Clark Museum in Astoria.

I am not a hiker/biker. I walk a bit (have bum knee) I have a tow car to sightsee. I like overlooks, mueseums, some shopping (little), maybe boat trips (whale watching), Would like some great local seafood. Somewhere I heard you can get fresh crab they cook for you. Also, some local eateries or must eat here places.

Up on Columbia River, the dam, locks, the sternwheeler boat trip, Mt. Hood wineries, brew pubs.

Thanks for your comments,

Dy in Northern Calif.