There are some people who tour on single speed or fixed bikes.
I would not be one.

As far as the road bike. Some might depend on your riding style. How many miles do you plan on putting in a day? 50, 100, 150, more? Gravel or paved roads?

If you wish to take the slow lane, then get the appropriate fat tire bike. On the other hand, if you're pounding out the long distances, then I'd go for the Allez or similar.