Los Angles is expecting a big rain this weekend, maybe some will make it over the mountains to the lake bed.
That could firm it up. If you don't need to make a long high speed pass you could search out a harder area not used by SCTA.
Looks like you have 4 wheels, if so that would help support it, just make sure there isn't any soft spots that would bottom you out. Tires with air would help.
The wind sailers or what ever you call them, [3 wheels on a frame with big azz sails, go like hell] might know a good spot.
We used to try a short squirt north of the start area which is at the west end of the lake.
JL222