You can drive to Whittier.. it is about 60 miles from Seward. You will have to pay a toll to go through the Whittier tunnel. The best thing to do in Whittier, I think, is to take the 26 glaciers tour on a high speed catamaran. There is also a sea kayaking company in Whittier. Not a whole lot to see and do in town (it is very small) but it is certainly in a gorgeous setting.