To help out for your planning, here are few helpful links. Some will give you info on ports for cruise and some will help for doing land tour on your own.
I have used all these for my tour which will be starting next week. I will provide update upon the completion.
- What’s at each port, maps, excursions: https://www.whatsinport.com/Alaska.htm
- https://www.alaska.org/ - lot of helpful info here for land tour. Ensure to checkout expert advise. Maps section has all the maps you need for road trip, scenic drive, as well as walking tours for cruise ports.
- Shore excursion details (supplementary to your cruise lines excursion list): https://www.alaska.org/things-to-do/shore-excursions
- YT Vlog- cruise crew on Royal Caribbean - some good Alaska cruise videos: https://www.youtube.com/playlist?list=PLwGQG_D2auZgpgQ0b2zxyLxoji4r6xEyP
- Visit TripAdvisor section for each place you are visiting - gives very good starting point for tour options.
- Trip Advisor Forums - Alaska as well as city/port specific forums have all the info you need
- Cruise Critics Forums - Check out Cruise Line specific forums as well as Alaska forum, again lot of info.
Above two forums would answer most of your questions related to Alaska.
One issue you will face - timings and logistics about tour options. That you need to explore in detail and see how it fits within you plan (road trip, cruisetour or cruise). You can ask for specific tour, timings and alternate options.
There are lot of experts and seasoned travelers on this forum, who are ready to help out. But before posting your question, ensure to go through forums and try to search for answer. When you post, include as much details as possible - like your interest, trip timings, your budget.
I am sure I may have missed some links as starting point. Feel free to add any other you found useful.
Happy Travelling...