I went on the half-hour dog sled experience with my 23 year old son and we both loved it! It felt like the perfect amount of time, and is a reasonable price for such a unique experience. It's a beautiful area you sled through and the dogs stay on a well-trodden path. If you have two people one person sits right on the sled, legs stretched fully out in front of them, the other sits on a "seat" right behind and slightly above that person, then the guide stands behind.
Our guide- and the entire staff- was great! The dogs know their job so well the guide never even has to say anything to them. I was hoping for some Yukon Cornelius style cliche "mushes" but no such luck, ha! And you stop to meet the dogs and take pics with them if you want to, about halfway through the tour and out in the wilderness. The dogs LOVE their jobs, when you stop they bark like "Go go GO!"
They give you awesome parkas to wear for free, and I suggest wearing them, it gets super cold when you're sledding even though you're only going about 10 mph they say. In fact they cancel the dog-sledding entirely if its super cold out. I was there four days and for three of them it was about -25, they canceled all tours those days. So be aware super cold weather is great for clear skies and auroras but not great for dog-sledding. Also, getting an Uber to the sledding place from Fairbanks is easy, but it can be a bit hit or miss waiting for one to take you back. But you shouldn't have to wait too long if at all. And if you're a Christmas fan I highly suggest visiting the town North Pole and the Santa Claus House while you're in the area.
The dog-sledding was so awesome! Highly recommended!