Everything else you mentioned is fine. Just wait until the release date to do so.

Reviews should be of finished films, not works in progress. So if the cast-and-crew screening is of the finished film, you can base your review on that.

Standard industry protocol is for reviewers not to offer opinions of films — in reviews, in interviews, on blogs, etc. — until opening day. However, if a film has been shown at a festival, it has been shown to the public and is thus fair game — though the studio might request that you limit your comments to a capsule review at the time of the festival screening, and save the full-length review until the movie goes into its regular release.

As for whether you can re-post your review at your blog (or have it re-printed in any other publication), that is between you and your publisher. They might expect you to specify that your review has already been printed in their outlet, or they might ask you to re-post only the first paragraph with a link to the review, or something like that.

At any rate, you are certainly not limited to the thoughts that you express in your reviews. You can express other thoughts about those films at your blog, or you can even express the same thoughts in different ways — provided, of course, that the usual embargos are not in place.