Hey Kayden,
You sound a lot like me. I love getting any and all information I can. Quite the planner. My wife and I are cruising on the Radiance to Alaska for our first time on May 27 and are really looking forward to it.
We are looking at going whale watching in Juneau and then heading to Mendenhall Glacier afterwards. We haven't paid, but planning to whale watch in Juneau as we've learned Juneau has a larger typical population during our time of cruise. I tried contacting Jayleen but she was not available our week. In her informing us she was not available, she recommended these other small boat companies: Harv & Marv Outback Alaska, Rum Runner Charters, Lost In Alaska Adventures, Moore Charters, and Local Guy Charters. They didn't pan out for us, but thought I would pass it along. Currently we are leaning with Juneau Tours. They have 2 boats with up to 26 passengers each. Mostly because they have a combo of whale watch followed by bus to Mendenhall Glacier. And the big kicker was that they have buses that pick up every 1/2 hour so you could stay at the glacier longer if you wanted so you don't have to try and rush our to the waterfall and back in 1 hours. I am hoping to hike to the waterfall then fly my drone over to the glacier for some close video and pictures.
For other shore excursions while on our cruise, we are also planning to take the Train to the White Pass Summit and then Biking back down while in Skagway and also doing the Eco-Tour Kayak trip when in Ketchikan.
We were planning to nature hike and possibly drone, if the right spot allows, when in Icy Straight Point, BUT I do get the point of more to do in Juneau than ISP so we still may flip the whale watch for more freedom in Juneau. Just not sure. Juneau is suppose to be the most populated of whales and even killer whales at first of June.
I look forward to feedback with regards to my post as well.