When we were in Alaska in 2005 we met a couple from Denmark who were bicycling around the world for their honeymoon. The said they had one change of clothes washing out the worn one each night, cameras and a laptop computer and I guess personal items. They only used other transportation when necessary such as crossing the ocean from Japan to Alaska. They were heading south from Alaska and hoped to be in South America for their summer. I am not sure what they did for money, but they expected to be gone a total of two years.
We actually saw them twice, once on the shuttle bus in Denali and then again at the park laundry room/internet room and they did indeed have all their belongings on their bikes.