.. Blocking the sandstorm

The truck could be big enough to block better part of the sandstorm. Ask around to find the owner.

Go as the customer (Vince) in the diner ( You need to visit the attraction to open this dialogue option. ) . It is his truck. Ask to borrow it. You need to get him a permit.

Then you have the keys to his truck. Use the keys on the truck and drive it to block the sandstorm. You get into the museum. ( Look at the lamp. )