You have a few problems here, first your included Natural History tour and second going too early. I'll assume you are in Denali Park May 22/23? The road isn't even open to the Tundra Wilderness tour full length usually, anyway- mile 53. The Natural history tour only goes to mile 16. This is the reason, why it is never recommended, distance is what you need in Denali Park for scenery and wildlife. More is always better. Another problem- if you are on a short cruisetour- you won't have time for anything else. How are you arriving? via train with one night has the only option of booking the Toklat shuttle but tough to get transportation lined up as Princess shuttles usually aren't running late enough for your return.
If you provide me more information on your cruisetour routing, I can perhaps offer other option? As for the "tour" options, the Denali Park tour is usually fixed and not what they are referring to. Tours would be the add ons at the destinations- flights, rafting etc.
With no disrespect, I completely disagree with the above in reference to purchasing the Tundra Wilderness tour independently. I don't know what "tour information" they are expecting, but the key to Denali Park is VISUAL, not any commentary. Farther is always better here for scenery and wildlife and the Tundra Wilderness tour milage misses completely prime bear habitat between Toklat mile 53, (same mile of the Tundra Wilderness tour) and Fish Creek, mile 63. Paying triple cost for essentially a bad "snack" too.
Fish Creek is my min. recommended distance in after June 1 (when this shuttle starts).
I have taken the Park shuttle many many times, and never had a driver who did not know Denali Park extensively, providing plenty of superb information.
If you really want the most information, do your reading about Denali Park before you go, get to the visitor center once there as well.