Haven't been there since 2005 but spent the summer and went anywhere that we wanted. If it is still available get The Alaska Tour Saver book, it around $100 and it's a 2 for 1 deal. We took advantage of it and it really enticed us to do much more touristy things than we may have at twice the price. Saved the price of the book on the first 2 attractions.
Take your time and have fun, whats and extra 200 miles to see something that you may never get back to. Your total trip may be 10,000 miles so whats a few hundred more
Don