Be prepared to fall in love - Alaska is special and you will never forget having been there.
My recommendations are based on having lived in Fairbanks for 6 years and having made a few return trips in recent years. Leave the 70-200 - it's not long enough and has significant weight and size - unless you don't have (or have access to) a 100-400. I would also set a low priority on the 500 - you need flexibility more than length and it may make your kit too large for carry-on. A 1.4 TC would be a better choice. I'm not familiar with the Olympus, but it could be a good choice. In any case, take two bodies but no more.
Denali is like no other place and it is huge and expansive. You have to take the park bus to get any distance back into the park. It's a long trip, but I would go all the way back to the end of the road. Give yourself several days in Denali but do be careful about getting off the bus and camping overnight. The camping will be primitive and some of those animals can be dangerous. There is a hotel and (I think) some cabins and camping at the end of the road into the park. It's expensive but would be memorable.
Enjoy. Here's a shot from Polychrome Pass on the park road.
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