Option #1: Try the White Mountain area. Should still be gate-free until just before the summit push of White mt proper. MAGNIFICENT views of the Sierra at sunset. Since this area gets a lot of sun during the day, I can't vouch as to the snowpack. But if you like looking at mountains, there's no better place to view the high sierra (IMO), than 12k up in the Whites.
Option #2: You might just be ready for a tent. If Lady F is willing, you could buy yourselves a set of the smallest Otter sleds (normally towed behind snowmobiles), attach PVC pipes and tow them across flat access roads closed for snow. I know, you're a wounded goose on skis, but this is best done on snowshoes anyway. As long as you're on the flats it is (almost) painless. And this IS boondocking!
My suggestion is to go to the Mammoth mt inn (9200 ft), pay them to park your rig there for a few days, and then travel the closed highway to devil's postpile (gated to autos) towards Red Meadow or further. You'll have Mammoth mtn on one side, Ritter/Banner on the other.
