Tiger4x4RV wrote:
I agree with the person who said to first try a trip with less elevation change. The coast is nice. Perhaps Morro Bay.
The least traumatic route, though far from the shortest, to Anza-Borrego Desert State Park is probably:
east via I-8 to Ocotillo, which has at least two lanes each way but sometimes high winds can affect high profile vehicles or even close the road. North on S-2 through the southern portions of the park. Or, adding many miles, North from El Centro on 86 and enter the park from the east side.
Next choice:
Go east via Ramona, turn north on 79 at Santa Ysabel. Turn right onto S-2, do not turn on the obvious S-22, go straight down the more gentle San Felipe Valley on S-2 to S-78. Turn left (east), proceed to Borrego Springs Road, go north (left) on that into the town. This route involves a lot of winding two-lane, but avoids the steepest grades and the big scary cliffs.
There is no route which is totally without trauma. Perhaps scout first with a daytrip in the car if you are really worried about getting there. Watch out for folks in a big hurry to get to the off-road areas.
I agree with what Tiger 4x4 RV Said, And I would say Morro Bay.