Hi Down Home,
I agree. It's great to get first hand knowledge of a place before you visit. I like the travel blogs that share a lot of pictures.
As agesilaus said, many travel bloggers are on YouTube. Another great place to discover them is on Instagram. You can search on a hashtag like #rvlife and you'll see tons of great pictures from rv and camping people. When you find one you like, you can follow them. And, most rv bloggers on Instagram also have blog sites and/or YouTube.
I guess you just have to figure out if you like reading (blogs), pictures (Instagram) or video (YouTube) best.
And thanks to JV for the page with all of the links. Lot's to explore.