Is this enough stuff for a weeklong spiritual journey into the desert?

You actually have all the spiritual stuff already too... you don't need the mind altering drugs, I mean "herbs", to get in touch with that which exists within your being. All these substances do is intoxicate you to the point where you may think you've had a spiritual experience, but in reality, you're just high. The most enlightening experiences come when we are clear and present, not drugged out of our mind.