We are planning to take the 9 hour Northwestern Fjord Tour in Seward. Trying to decide if we should also take the whale watching boat in Juneau. We are flying from Anchorage to Juneau and then taking the ferry to Petersburg. We arrive at 9:30am and leave on the ferry at 6:15. We will have a rental car for the day. Also wanted to see Mendenhall Glacier. The whale watch leaves at 12:00 and returns at 3:00. Thanks for any help.