Curating an electronic journal ended up taking about an hour a day, between sorting through pictures, writing, and posting. Just sitting down with a notebook and pen was only 20 minutes a day, but then you end up with hundreds of pictures of ... what was that? Talking with locals can take up huge amounts of time, if you and they are interested. I found small town librarians were some of the most interesting people to talk to; they were usually well educated and informed, and if the library wasn't busy, bored and anxious to chat.
Where are you spending your touring nights? It sounds like you might want to mix it up. If you've been stealth camping, look for campgrounds (especially those with hiker/biker sites), or city parks, or even a courthouse lawn. You'll find people to talk with, or historical markers, or even a store with books or magazines. Camp out at a ball field, and you're set for games to watch until long after dark. If you've been stopping at motels, try to find a local diner, the kind where people ask you what you're doing, where you're going; or even invite you to share a dinner. Time will fly by.