I've only worn the booties around the house (we don't use a heater). They seem to work well.
Although, I've always used 3/4 pads and am thinking that this probably accounts for always sleeping with cold feet.
The difference between the Exped Synmat UL size small and the size medium is 1 oz. The difference between the Downmat UL small and medium is about 2 ounces. My goosefeet are 2.2oz. I'm wondering if I'm just reallocating the weight elsewhere by using a smaller pad. I'm going to try a full length pad with and without the booties.
If the Ursack isn't approved, my girlfriend will carry a Bearikade Weekender in her pack (hers is bigger than mine). The food will only go inside of the Bearikade at night, inside of a Nyloflume bag. I am hoping I can prevent food scents from getting inside of the Bearikade so when she's carrying it we can store things inside. I'm a bit weary about storing a sleeping bag inside of the Bearikade; the last thing I want is a sleeping bag that smells like beef jerky.
Our dehydrated meals will be stored in zip lock baggies which will turn into trash baggies after their contents are eaten.
Map and compass don't really seem necessary on the JMT, but I will probably bring a few pages. I don't know what their weight will be yet since I haven't printed them out.
Girlfriend will be carrying the camera, but I'm thinking about getting one for myself. I'm looking at the Canon Powershot S100, Olympus XZ-1 and the much heavier Panasonic Lumix DMC-G3 with kit lens.
Last year I only wore my leg baselayers to sleep in. I'm going to use a 20 degree Zpacks bag instead of the 30 degree this year, so I shouldn't need them.