Get a low profile car. Just a normal popular car, with a normal color. Don't drive drunk. Be aware of the speed limit and don't exceed it by more than 5 mph. Don't tailgate.
Just follow those rules and you won't ever get pulled over. And if you do get pulled over, make sure your car doesn't smell like weed and you aren't high. The weed should be sealed up and stashed in the trunk. If you are getting your car searched and getting drug dogs called on you then you are fucked. Prevention is by far the best route.
^^^^^^^^ this....
Let me add pre-flight your car like an airplane. Do a walk around and make sure all tail lights and turn signals work. This is NOT the time to get a fixer ticket.
Keynote rule here break only 1 law at a time. So NO SMOKING while transporting! Put all pot into a container that can be sealed wiped clean and sealed again then place in a locked box in the trunk. NEVER EVER EVER carry pot in the passenger cabin of a vehicle any vehicle including a gooney bird. Most people forget transporting is NOT smoking! HUGE difference sports fans. If you transport you don't smoke while you transport.
Now let's just say this isn't a transport. You want to carry just a J to smoke. Again, trunk sealed in a few sandwich bags to be opened only at the event.
If you do choose to impair yourself while driving and you get stopped EAT IT. If you were stupid enough to carry an ounce I hope you can eat an ounce FAST and leave no 'green' in your mouth it's tough to do my limit is one J. Ok now the other thing I used to do is put all stems, seeds etc... through a blender until powdered and lightly toss all over my car then vacuum out. The drug dogs went frantic over the entire car.
At that point without a specific hit they usually either release you or de-panel your entire vehicle. I've seen the vehicle depaneling ouch! But they use the coolest ever air powered scissors (right Loli?), those suckers go through your panels like hot knife through butter LOL. I want one!