The OP seemed to be interested in landscape so that is why I think he needs something much wider than the 70 - 200, and if Wildlife is an interest, that time of year it may be too short.
A monopod is very useful, I had mine on constantly with the 150-500. It not only helps to steady the camera for shots but I found it easier to carry my camera on the bus and be at the ready.
A tripod is nice to have but they are not welcome in many areas, bus, ship, train or excursions. Not saying they can't be used but you have to be careful and some places they are forbidden. My 18-135 on the 60D was on a rapid strap, very useful.
Now as to Wildlife there is no correct answer, the time of year and weather will have a lot to do with that. Scott didn't have much luck in the park, I how ever shot Grizzly, caribou and many Moose with the 18-135. Saw over a hundred Moose, many Grizzly, Dall Sheep. Weather was bad, well into Sept, so the bears were feeding heavy at lower elevations. Moose were rutting and stopped traffic for 30 minutes at one point. In June this will not be happening. I did not see" the mountain" because of weather, 3 days and no Denali showed for me. It was a trade off, bad weather equals lots of Wildlife, good weather = good Landscape and maybe a great shot of the Mt.