Iceclimber - I don't think you'll need snow shoes given the current trail conditions. Just the crampons with waterproof / snowproof shoes should suffice. The trail does not have deep snow anymore and is broken in quite well so unless there is a recent moderate / heavy snowfall or snow shifting wind, the conditions would remain the same.
Personally I didn't use snow shoes because I had no prior experience with them and because of the backpack weight.
Also, I used a helmet. But it's one of those things that you think was unnecessary until one rare day when it saves you from a serious head injury. So I cannot not recommend carrying it!
Good luck for your climb!
