I will be going to Glacier National Park In late July. I am planning on taking quite a few pictures, as I love traveling to the National Parks.
I have a t4i, 70-200 2.8 IS II, 18-135 IS, and the 25mm macro extension tubes.
I have two main questions concerning this trip.
First, should I look into purchasing (or perhaps renting) a specific wide angle? I hope I can upgrade to FF sometime, but this likely won't be until about 5 years down the road. The two options I was considering here are the 16-35 II and the 10-22. I understand the crop vs FF and everything, but is there a big quality difference? I also like to try some astrophotography, but either lens would be better than what I currently have as far as that is concerned (and besides, with the 600 rule and my crop body the not as fast lens should allow me to have brighter pictures, all things considered). Are there any sweeping landscapes at Glacier that beg for an ultra-wide angle shot? I'm not the best at panos, so I'd rather not count on that.
Secondly, should I add an extender for wildlife? If so, would the 1.4x III be enough? I have read many reviews that the 1.4x III is a better extender than the 2x III, but am definitely not opposed to the 2x III at all. If there is no need for an extender, I would rather save the money, but I definitely don't want to miss that moose/bear/bald eagle shot because I don't have one (or don't have the right one).
Lastly, are there any locations that are a must? And is there any other specific gear that I "must" bring to have a successful trip?
Unfortunately, time is kind of a rush as the spectacular lens rebates are ending soon. Any advice is greatly appreciated!