All the above is worth considering of course, but i’d try to pick places that are not only convenient for your wife, but convenient for YOU. That is, places where resupply isn’t so easy, trail angels aren’t around as much…places where you’ll WANT to hop in a car and split for a couple of days.
Walker Pass. This is a bit further away from L.A. than Agua Dulce is, but not that much further. It’s a real problem spot for resupply though. Hitching isn’t easy, the nearest towns aren’t as good. But Ridgecrest isn’t far by car and you could easily have a nice couple days and resupply there. This is about 550 miles from the Mexico border.
Independence/Onion Valley/Red’s Meadow/Mammoth Lakes. This is a little longer of a drive, unless your wife can find a good flight into Mammoth Lakes Airport. But it’s a really beautiful area that might give her a better feel from town or what you’re out in when you’re hiking, especially if you stay in Mammoth Lakes. With some fishing around you can find very cheap nice condos in summer there, since it’s primarily a ski area. Useful area for a car, restaurants, and resupply. (My girlfriend, now wife, met me here for the first of two visits. ) This is about 800-900 miles from Mexico.
Tahoe. Already mentioned. Good for car and resupply. About 1100 miles from Mexico. Or Sonora Pass//Bridgeport a few days earlier. Or Truckee a couple days later. Really MOST of my and other people’s ideas wouldn’t be such a bad thing to make a flight reservation early. If you’re ahead or behind schedule and she’s driving from the airport, it’s usually no big difference for her to drive a few miles up to a different trailhead meeting point. Remember, for you it might be 3 days between resupply points, but for her that’s probably only an hour of extra driving to meet you at a different place!
Ashland. So much to do and see and eat around town. Good place to get a ride from the trail and to groceries and post office, etc. Pretty ideal meeting place except the hotel might not be cheap. 1700 miles from Mexico.
Cascade Locks. Maybe the most perfect meeting place of all. Easy in and out from Portland for her, but an important ride for you. Everything you could want in beautiful Portland. Resupply from Trader Joes there. Ship packages ahead to WAshington. Movies, shows, restuarants, beer, etc. 2150 miles from Mexico. (This is the 2nd place my wife met me, although i was ahead of schedule, so she drove an hour into Washington, picked me up at a road crossing, and then we went back to Portland for 2 days, and then back to WA for a night at Kelly’s B&B in Trout Lake.)
Snoqualmie Pass. Already mentioned. This might be too close to the end to be worthwhile. But Seattle is a great visit of course.
Hope this gives you a few more ideas…
:cheers
markv