Looks like good progress, Daniel!
The really easy items on which to save large amounts of additional weight are the pack itself, water, and food, but we've already talked about those.
I would dump the solar charger. I doubt you'll have any need for it. You've got the 4 spare batteries, which should be plenty for 10 days. You won't need the flash on the camera, and the GPS won't chew through batteries if you don't leave it on 24x7. MTR will let you charge batteries for free (or, for convenience, you could just send yourself batteries in your resupply packages, and mail the used ones home). -5 oz
For carrying water, you've got the bladder, the folding bucket, and the quart bottle. These seem redundant. I think you can easily ditch two out of three of these. -7 oz?
Is the 2 oz of soap only for hand washing, or is it also for dish washing? If it's only for hand washing, you can put 1 oz in a tiny dropper bottle. For hand-washing after pooping, all you really need it about 4 drops in each palm. -1 oz
There are a bunch of other items I've already suggested, but it's up to you whether to do those or not.
It might be interesting to figure out how much of this is actually going to be carried by your dad. Part of what's contributing to your extremely high pack weight is that you're totaling up all the gear and listing it as if you were carrying it all in your own pack. One big item is the 2-person tent. If you break out the shared items and split that weight in half, I think you're getting pretty close to the kind of load that a lightweight backpack could handle, and that would be a huge win. By switching from the 77-oz Kelty to a 16-oz Gossamer Gear, you'd be saving 3.8 lb, which is enormous. The GG is quite cheap. I know you've got a sentimental attachment to the Kelty, but ... have you seen Toy Story 3? We all love Buzz Lightyear, but at some point he needs to go into "attic mode."