All, thanks for the prompt replies! Here are a few responses.
SarahD - Awesome work on your climb! I saw your post elsewhere in the forum with the quick review. Thanks for the info on the water sources. At this point we aren't planning to rope up (though we will be brining the 'pons, ice axes, and helmets).
RenoFrank - thanks for the videos! I think I already bookmarked them to refer back to.
SaltyDog - Our guided trips have included (basic) self-arrest and steep snow travel with ice axe and crampons (not to mention my well worn copy of Freedom of the Hills and our practice in Colorado), but we're choosing this specifically as a challenge to do on our own. If the F400 (or options) appear above our threshold, we're comfortable turning around.
Bobpickering - thanks for the insight, and advice on the tent/bag. I figured the 0-degree bag was called for, but a 3-season tent would certainly be a welcome weight savings over 4-season.
We have 3 open days in our trip, so whether we do a dayhike to LBSL before a 1-day attempt or go for 2 days, we have a little flexibility. If we go for the 2 day option, does anyone have experience on early season conditions for Mt. Muir? I wonder how spicy the class 3 summit gets.
Thanks again!
