Just backup the database and the front-end code powering the website. Crawling the site is taxing on the servers, insufficient for guaranteeing full coverage, and doesn't facilitate restoration of the site. Since you are the administrator, that is the most logical solution.
I am an admin of a forum and I want to back it up in case it goes down for some reason (especially since some of the material there is adult-orientated). I have tried WinHTTTrack, but that only saves individual pages and not any of the topics in that particular forum category.
What program should I use to download an entire forum and its posts for backup/offline use?