Thanks guys for your comments.

I'll check if I can extend seward hotel reservation by one more night. Whittier seems like a good option; it is driving distance from anchorage if I cannot extend my stay in seward.

I haven't really done any search about Homer. Let me take a look at it.

I am also trying to include Valdez or Fairbanks in the itinerary, but I guess we don't have enough time for that.