I have been up west glacier twice- Banner can be done from the Banner/Ritter saddle on that west side's glacier from Lake Catherine without crampons ,although going up is easier with them, or microspikes would be fine. Not enough exposure or runout problem for ice ax. Coming down after sun has warmed the surface is like boot-skiing, slushing along /no crampons, although the suncups need negotiating.
Since you are camping at Ediza, you must mean the east glacier- Different ball game. I have not done it, but it is much steeper and others will chime in about technical skills and equipment needed.
I should also mention about this years conditions: I just did the usually-soft Lamarck col semi-glacier. This year it was a steeper, hardened, old-glazed, gray-dirtified technical route.
We had to circumvent by going up rock on the side. Banner/Ritter glaciers may have also been affected by this years low winter top cover. Buyer beware. Need more beta.