I'm migrating a site that has several different content types. One of the few types that is supposed to migrate are blogs (the default Drupal core blogs). Since there are several types of content that are saved as nodes, but won't be being used on the new site, is there a problem with just migrating the entire node table over? Or will not using some of the types give me fatal errors?

For example, the forums there were being saved as nodes and as far as I can tell they are being saved in the same table as the blogs. Forums will no longer be used but I'm not especially keen on the idea of trying to root them out of the db before migrating. So will not having forums on the new site cause problems if I copy them over in the db?

Also, are there any pitfalls with the node tables when migrating? Right now I think I'm deleting everything I will not need to migrate prior to making a backup but in case I miss deleting something I don't want to start over. Thanks.