Looks pretty good. If someone gives you grief about tackling such an iconic trail without previous experience, consider that a very successful thru-hiker’s and YouTuber’s (“Homemade Wanderlust”) first backpacking trip was the whole dang AT. And she did fine. Read up in advance, watch some vloggers, and you can be pretty dialed in.
If you don’t know how you handle high elevation, I’d suggest you read up on that, try at least a day hike, and, immediately prior to your BPing trip, spend a few days at an intermediate or high elevation. Even through I have below-average problems at elevation, a few nights spent high before a big trip always help me a lot.
Brilliant of you to rent the tent and bear canister. That 3-person tent will give you a nice amount of room and the weight isn’t not bad, especially between two people.
That “Gossamer Gear Long-Handle Bamboo Spoon” is a great deal – for them. I get bamboo spoons for 90 cents each, and mostly give them away (got a bag of 30 sitting at my feet right now). Selling them for $10 is a great business model – they do compare favorably, in many ways, to titanium spoons selling for $12-18.
It’s not great in wind, but a BRS-3000T stove for $11 and 25 grams (yeah, 0.9 ounces) beats everything else in weight, size, and cost.
You forgot the mini-Bic. If your stove had an ignitor, I’d bring one mini-Bic in your repair kit. MSR Pocket Rocket 2 does not have an ignitor, so I’d have one in my kitchen kit and a spare in my repair kit. I’d leave out that 70 gram compass (the JMT is a hard place to get lost, your phone will have GutHooks or some app on it, and your phone is a compass) before not taking a back-up lighter. Or just take a button compass if you fret about heading the wrong way off a cloudy mountain top (except there aren’t any mountain tops, just passes and a trail that goes north-south).
+1 on the chrome umbrella. I find the high Sierra, mid-day, feels 10-15F cooler under mine.
Obviously a very personal choice, but in lieu of the Diva Cup, if one is using birth control pills, she can just skip the placebo pills the last week and start the next 3 weeks of active pills, delaying menses for another month.
Runners like hydration bladders. I don’t. It’s hard to tell how you much have in them, they can be hard to clean, and they freeze up for half the year (in my area). More SmartWater bottles, Gatorade, etc, are free at the recycling center. An extra water-bottle cap is a nice 3 grams of insurance.
You’ll learn a lot about all of your gear on your shake-down trips, but if at all possible, use the same tent as for your JMT hike. At an absolute minimum, when you pick up the rental tent for the JMT, find the nearest lawn, and set it up. If you haven’t done that, for any tent, prior to a trip, you don’t really have a tent with you, IMO – rather, you have a 60-90% probability of having a complete and functional tent with you.