Chironex

Hi Jim, Welcome to Bananas! The bags are mainly to aid in ripening as the plants are sterile. Whether they are blue, green or red, really makes no difference from what I have read. While it has a reason for commercial growers, most of the backyard growers don't bag them at all. Good luck!
What you may want to do is build some supports to prop the bunch. There are several posts here about that, just search for key word prop or support, you'll find lots of posts.

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Scot