Our family (2 parents, 3 kids) spent a day on Seavey's "Real Alaska Tour," which starts with a pick-up at the Alaska Railroad depot in Seward (timed to meet the 11:05 train from Anchorage). We drove our own car and parked in the depot's parking lot. The van held around 20 people, and it was almost full.
We were taken first to Seavey's location outside Seward for a sled dog ride and a lot of discussion about the dogs. This was a fantastic experience, with very knowledgeable guides/mushers. Having already attended Seavey's rodeo in Anchorage (see my separate review), we were able to compare the two and to see the Seward operation as being first-rate (with the Anchorage operation being about third-rate).
Following a good sit-down lunch at a local restaurant, our tour guide then took us to Exit Glacier, where we hiked for about 1/2 mile uphill to examine the glacier up close (caution: although not hazardous, the hike is somewhat demanding and does demand one's full attention to avoid slipping, etc.). Our guide explained quite a bit about the glacier's formation, movement, and so on. One huge and vivid takeaway: global climate change is real, and you can see it as you track the changes in the glacier's placement over the last few years.
The afternoon continued with a visit to a salmon run and a short tour through downtown Seward. Although the town is very small, there is a lot of interesting history, much of it associated with the 1964 earthquake.
Overall, this was a superb tour - well organized and professional from top to bottom.