if you want to get a true picture of how long it will take you, use a GPS/ MAP app. If you are going to be there, on say a Thursday, use a Thursday or two for a sample. Get up early on Thursday and plug your friends address and the park in to the app. See how long it says it will take you. Yes, every day is different due to accidents, weather, etc, but it will give you a better idea of what you are really dealing with. You can also use WAZE and put in a planned trip. It will show you what the typical traffic flow looks like. For example if I put in SNA to the park, I can see that 7am it might be 20 minutes, but at 8:30am it might be 40 minutes. You can put in what time you want to arrive and it will tell you what time they suggest you leave.