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That's good to know. It sounds like that's probably the best way. I also use Screaming Frog (http://www.screamingfrog.co.uk/seo-spider/) to try and crawl sites and with dedicated 2Gigs of ram, it's able to crawl around 50k pages. If your site is structured in sub-folders, you might be able to break it into parts and then crawl. But then if not, the SEOMOZ Enterprise looks like the way to go.

That is not through the campaign, it's through the Crawl Test Tool at http://pro.seomoz.org/tools/crawl-test