In the whole region, very early morning is prime time for wildlife simply because there are fewer people about. With the rapidly-lengthening days "early" means painfully early alarm clocks. Moose and occasional black bears can be found in the flats leading up to Portage glacier. Check the shoreline of the lake for floating ice forms. Great photography when the wind has been kind and pushed floes within range.
My two favorite scenic locations are Exit Glacier near Seward and Summit Lake vicinity. At the glacier it's irresistible to get close. Do that, but then wander far downstream for some broader views, especially those shot with low POV to make the stream large in the frame with the glacier looming overhead. You can also take the trail uphill toward the main glacier field, but it's a long walk to the top. Partway up are good views of Exit glacier, but afternoon light is generally best. I've seen both blackbear and grizzlies in the vicinity of Exit, though the park service gets pretty frantic when they appear due to the large numbers of people.
In the vicinity of Summit Lake, don't confine yourself to roadside views. Venture out on some of the trails and especially into the deltas of the feeder streams.
I don't remember the names of the lakes, but there are several small ones beginning at the Homer cutoff which provide dramatic scenery when the light is right.
Fair to great opportunities for marine mammals and birds via the assorted Kenai Fjord boat tours out of Seward. Excellent aerial shooting around Seward, but most people don't think of it or are put off by the charter costs.
There can be great birds at the marsh/wetlands near Kenai- right off the highway.
Potter Marsh just south of Anchorage has great birds, especially Arctic Terns and rednecked grebes in May. Nine miles south of Anchorage watch for Dall sheep along the uphill side of the road. Park and hike up the trial system for closer views. There's a natural salt lick that attracts them down near the road, and there are often several more concealed from the road for each one you can see at road level. They're pretty tame if you're pretty calm and knowledgeable about animals.
Great alpine scenics in the hills above Anchorage, accessible from the ski area toward Palmer or at the top of the Rabbit Creek roads. Sorry, but I don't remember the names of either.
Lots more around, but those are my favorites when I'm in the vicinity with time on my hands.
