Spake the esteemed Mr. Korkin...

If you are in Eastern Sierras don't miss Lundy Canyon, arguably most
beautiful in all Sierras.
going N on 395 there is turn-off ab. 2 miles past Lee Vining almost past
Mono Lake.

One of my favorites.

Camping is plentiful and natural, large lake w. small supply store. Scenery
is fantastic
and great hiking for kids too. Drive all the way to the end of road to see
falls etc.
Mono lake has great scenery too, specialy South Tufa and Panum crater full
of obsidian.

The Mono Lake Committee has a fine reference shop and the visitors center
has some very educational displays that the wee ones might like.

As for Syncro fun, try Brislecone Pine forest from Big Pine, there are some
great roads, one going above 12,000' and scenery out of this world. Great
descent to Bishop on 4wd road.

(the turnoff is for Westgard pass)

If this 4WD road is the Silver Canyon road down to Laws, it can be tricky.
Inquire first.  The White Mountain Road has a gate before Barcroft Research
Station, but a very fine drive.  The short walk or the long hike at Schulman
Grove is worth the trip.  There is dry camping at Grandview CG.  Beautiful
view of the Western escarpment.

Drive up SR 120 towards Tioga Pass.  There are three little campgrounds up
high by Ellery Lake and Tioga Lake.  On the south side of the road before
you begin the climb are several beautiful County campgrounds along Lee
Vining Creek.  This is on your way to Lyell Cyn trail anyway.
Buy a parks pass ($50) in Yosemite.  Good for all NPS parks and a few
recreation areas.  Well worth the price.

Just west of the town of Bridgeport are some maintained hotsprings.  Inquire
locally.

There is much more to see, could name 100 more places...
Leon
Torrance, CA