Cruiserdrew
On the way there
So you are saying extra gas might be overkill?
You will be happy with extra gas. Seriously, with a 2F, this trail goes through the gas. More than once, I've had to give 5 gallons to someone else and so 10 gallons extra is good.
I buy gas at Fresh Ponds, then drive up the hill (it's steep and burns through the gas) and pass by Ice House (usually has expensive gas). Sometimes I buy gas there but you don't need to. It's a long way from Fresh Ponds to the trailhead, that alone is 5 gallons worth. Then the trail is 1-2 MPG with a carbed FJ60. Better with fuel injection.
But, with an FJ60, and 5 gallons of extra gas, you'll get back to Lake Tahoe. If you have 10 gallons extra, you'll have more options.