I have sand toys, and all my 40 ft toyhauler out onto the sand when camping. Doing things like this definitely is an art. 😎
The lightning will perform just as well, and maybe a little better than most other trucks on the sand: with equal tires. I am disappointed that I can't get an ER without the utterly stupid 20" wheels. For off-roading, it is key that you air down your tires and get good sidewall flex (I run 8lbs in the sand). First order of business when the lightning gets here is to get a good set of 17" wheels, and give away the ridiculous 20s that come on it.