Laughlin is in Nevada; Bullhead City and Lake Havasu City are in Arizona. Each state licenses retailers separately. Cannabis may not be carried across state lines under federal law, even between states that allow adult-use sales.
ID
Expect to show valid identification proving you are 21 or older. See ID & age rules.
Questions
Can I take cannabis from Needles to Laughlin or Bullhead City?
No. Carrying cannabis across state lines is illegal under federal law, even between legal states.