Here's the route directions I gleaned from ChuckH's directions, ExSkiBum's descsription, Groo's route map and MadMike's & Skyway's suggestion's. Big Thanks :clapping: to all for helping put this together. I'll print some copies for the less fortunate and have them available at the hotel's BDR eve briefing/meeting.
Depart Hilton Hotel
Head South on US-395 8.9 mi
Merge onto SR-431 [Mt Rose Hwy] (West) 22.9 mi
Turn LEFT on Country Club Dr.
Turn LEFT (East) onto SR-28 [Tahoe Blvd] 13.4 mi
Bear RIGHT (South) onto US-50 12.7 mi
Consider a restroom stop at Tahoe. The "Day Use" area by the lake?
Turn LEFT (South-East) onto Pioneer Trail 3.7 mi
Turn LEFT (South) onto US-50 [sR-89] 0.9 mi
Turn LEFT (South) onto SR-89 [Luther Pass Rd]
Turn LEFT (East) onto SR-88 [sR-89]
Turn RIGHT (South-East) onto SR-89
Markleeville is 90 miles...time for a 15 minute break then head for Topaz for gas and stretch break.
Turn LEFT (South) onto SR-89
Turn LEFT (North) onto US-395
Fuel stop at Topaz Casino
Turn LEFT (South) onto US-395 21.2 mi
Turn RIGHT (West) onto SR-108
Topaz to Dardenelle is around 60 HARD miles up the pass. Even if you stop for a quick photo op at the overlook, stop in Dardanelle for restrooms and hydration. General store and facilities.
Turn RIGHT (North) on S Washington St
Consider a fuel stop if necessary or wait until Murphy's
Turn RIGHT (North) onto Parrot's Ferry Rd.
Turn RIGHT (East) onto SR-4 8.3 mi
Lunch at Murphys, return North-East on Ebbets Pass Rd 0.2 mi
Stop at Lake Alpine (HYDRATE--drink water)
Bear LEFT (North) onto SR-89 through Markleeville
Stop in Markleeville if desired
Turn RIGHT (North) onto SR-88
Turn RIGHT (East) onto Carson Valley Rd
Turn LEFT on Diamond Valley Rd (West) 109 yds
Turn LEFT (South) onto SR-88
Turn RIGHT onto Fredricksburg Rd.
Turn LEFT on SR-206 [Fairview Ln.]
Turn LEFT (North) onto US-395
Exit Eastlake Blvd. and turn Left
Tur RIGHT on Hwy 429
Turn LEFT (North) onto US-395
Bear RIGHT (North) onto Ramp 395
Exit at Mill St. and arrive at Hilton Hotel, bruised, beaten, dazed & confused!