If you go up 99 to Merced (hwy 140) and go in the road is less hilly, less elevation and paved well.
However if you instead turn at Fresno and use hwy 41, it will take at least an hour off your commute time, although the elevation is higher. The road is good, though.
We were there just a year ago end of March and we got snowed in. Great trip. I've tent camped in the park dozens of times, this last trip was my first with an RV. I like Upper Pines.
MOTHER SHIP Winnebago View 24H (2007 Dodge Sprinter 3500 Chassis, 2008 Body)3.0 L M-B Diesel V6 bought used with 24K miles. Toad: ROCKY the Flying Squirrel.