We go up for the whole summer every 2 years and 2015 is our year again. If you get to Valdez, you'll love it. Be sure to visit the town museum, and the tsunami display, 2 different places. Pink salmon are in shortly after the 4th of July and silvers come in in the last 3 weeks of August. Both can be fished from the bank, but silvers are better from the local charters. Halibut can be had by charter but it's a long run (100 mi) to the fishing grounds and they've recently changed the limits so check closely before you get a charter. Weather in Valdez can be cold and rainy, but that's fishing and Alaska coast. Uniform of the day in Valdez is boots, multiple sweat shirts and rain gear, anyplace.
Also check out the old town site and the Valdez glacier. Just a few minutes drive. The WHitney Museum is also a don't miss. We like the Stan Stephens boat tours, both the short and long, but prefer the long.
If you're in Alaska a trip to the Kenai and Homer is cool and takes you through Anchorage. Tons of things to do at either place, and side trips to Whittier and or Seward are also worth the time.
All in all, there's far too much to do in one season, so choose wisely. We're still doing new things and have been up 6 summers and 1 winter (to see the start of the Iditerod).
We fish a LOT and just love the place.