migration to a different subversion repository

I started a project in one repository
(http://svn.freegeek.org/svn/mediawiki-webdav) and now want to move it
to a different repository
(http://svn.wikimedia.org/svnroot/mediawiki/trunk/extensions/WebDAV)

Ideally I'd preserve history and Subversion properties. From what I've
read however,
(http://article.gmane.org/gmane.comp.version-control.subversion.user/64518) this requires the svnadmin command, which must be run on the server hosting the repository - I don't think it will work remotely on a Subversion URL. I don't have this kind of access.

As far as I know, my only other option is to "svn export" from the first
repository and "svn import" to the second. Is there a better way to
migrate a project from one subversion repository to another?

Thanks! Jack