http://the-ride-info.blogspot.co.uk/Blogger is free (albeit Google, so there's a cost somewhere even if 'only' that they know about you). Set-up is incredibly simple.
Wordpress needs more work and, I think, needs a web site to hold the blog.
Really, start from the other way around: who will see it, do you need much control over appearance, will you want to hold documents for download, etc? If yes, then go web site.
Either way - and especially with Blogger - remember that it could be lost at a moments notice, so bavk-up important pictures etc.
Another option would be a Facebook page.
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