Most of Yellowstone does not have wifi. Neither is there any cellular phone service through most of the park.
When we want to publish posts to our blogs, we prepare the posts in advance. Then, as we are exploring the park, we include in our plans for the day a stop where there is cellular phone service and where we can use our phones’ mobile hot spot feature.
We found a really good spot on the second floor of the Old Faithful Inn lobby area.
The cord to the phone is not necessary for mobile hot spot use. It is a USB cord that is being used, in this case, to provide power to the phone from the computer battery.
Since we are away from internet access so much this trip, we are using Windows Live Writer to prepare our posts and are scheduling some posts to automatically publish in subsequent days.