Hey there,
we're having the same problem. What's a bit annoying is the fact that this used to be possible, i.e. a year ago or so you could construct an URL containing the account ID as "__c" parameter and the campaign ID in the fragment, but at some point this stopped working (even though the URL structure doesn't really look different than before).
Having shareable Adwords URLs would definitely be a great thing, but I suppose the API forum probably isn't the right place for feature requests for the web interface.
Cheers,
Dorian