Ideas for a summit approach pack

This?

I have one of these that I like a lot (I like water bottle pockets).

No idea on lead times.

An REI Flash 18 or Flash 22 pack might fit your needs.

Another vote for the REI Flash 22.   I got one a few weeks ago and really like it.

Mine weighs in at 11.9oz…after removing the waist strap.

Thanks for ideas so far. In researching this today I see I can spend a lot less with a pack that is lighter and more packable in my main HMG pack.

I myog’d a scaled down Stitchback Gear THRU50 using some Hex70. I believe it came out around 9-10 oz, 25L capacity, very stuffable if you minimized the foam and got rid of the belt. Sizing is totally customizable and I’d strip a lot of features on this one next time if building for myself (bladder/frame pocket, bladder pass thru holes, the adjustable strap system I made for my son to grow into it).

This one looks promising to me: https://bivysack.com/shop/ols/products/daypack-stuffsack.  Only 2.9 ounces, though the material is listed as out of stock.

Amazon has plenty of packable backpacks for cheap and light. 4oz, https://www.amazon.com/4monster-Packable-Backpack-Lightweight-Resistant/dp/B07D33FVBN/ref=sr_1_1_sspa?dchild=1&keywords=packable%2Bbackpack%2Blightweight&qid=1620764790&sr=8-1-spons&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzRVdROE5OMlBCSTNLJmVuY3J5cHRlZElkPUEwOTI1MjE1VDVOVE5RQURSNlkzJmVuY3J5cHRlZEFkSWQ9QTA3NzY0MzYyMElYUTQ0WEdHOERCJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ&th=1&psc=1