Yes letter your truck if you want to!
I understand that a young man doing ok does not want to draw too much attention to himself, might look like an easy mark to a bully. You are smart to see this. It is wise to not want to flaunt your success.
You young guys out there have to prove yourselves to this world. Make a good business image for yourself. Be friendly to everyone, be honest, and yes keep your eye out for trouble.