Overall there are only a couple of roads to and in the park. The only entry from the Palm Springs side is Cottonwood. Fairly long uphill into the park from that gate. As far as I know no water so be sure to take more than enough as it is still dry and fairly warm there. If you drive up into the park the ride out to Keys View isn’t bad. Last time I was there the road wasn’t in the best condition but rideable. On a nice day you can see across the Coachella Valley and beyond from Keys View.
If you drive up into the park I would say the road over to the West side of the park has more views than going East and North toward 29 Palms. Unless you want to drop down into 29 Palms, but of course you have to turn around and face about a 12 mile climb (Hwy 62 to Skull Rock or so).