Reddit mentions of Boss Manufacturing Company 8439L Frosty Large Grip Glove, Blue

Some money saving tips:

Go for a 3/4 length pad. Foam pads do not need to be full length as your feet and head can hang off the pad.

Skip the dry bag. A single garbage bag will fill all your waterproofing needs. A simple nylon stuffsack will do the job.

A rain cover is not needed. See above.

Here's some cheaper gloves that will work just as well. You can pick them up at many gas stations here, but not maybe in San Diego.

Go with the down jacket.

You don't need expensive rain jacket/pants. For full protection, these frogg toggs will work just as well. You can even go with dry ducks suit or poncho. It doesn't rain much in California.

An ordinary baseball cap with work just as well. Just add a bandanna to shade your neck.

Your hiking shirt will be fine for after the desert. You can always roll your sleeves up in warm weather.

Personally, I find underwear pointless when I hike.

The best sunscreen size is the 3 oz container that is sold in dollar stores here.

For anti-chafing, any lotion will do the job. So, just snag some from a hotel. I think sunscreen would work as well, but I haven't tested that out yet.

Just use an ordinary spoon.

Use the bear canistering ordering program (or you might try applying to the loaner program.) Either way, you'll save on shipping it to kennedy meadows.

The mosquito headnet is unnecessary. Mosquitoes will be pretty rare. If you do run into them, just hike to a place without them.

Skip the trowel. Use your feet to dig holes.

You don't need a towel.

I wouldn't buy any special water containers. Just use plastic soda bottles for your needs. I've had too many expensive containers break on me to trust them. Never had a problem with a soda bottle.

The external battery for your phone seems unnecessary. My phone could easily last the week between towns if I would turn it off between uses. This included listening to it heavily and even watching movies.