I use it all the time - @paul_jackson. It's great for linking to all sorts of useful people and organisations to get up to date info, such as: @CampsiteFindr, @CampsitesUK, @discoverferries, @POFerriesupdate, @CampsiteChatter and so on. There are literally thousands of useful Twitter accounts for motorhomers who travel in both the UK and Europe to follow. The best way to find them is to look at the Twitter account for someone who's also a motorhomer (like any of us mentioned above), click on their profile to see who they follow and, if any take your fancy, click on the follow button in their list - then you'll be following them and will see their tweets in your timeline. You can then look to see who they follow and that's your day gone!
I wouldn't be without Twitter now.