What is the local currency?
The USA’s currency is the US Dollar ($).
Should I change money before I go?
It’s up to you whether you change money or not before your trip. You may get a better exchange rate by changing money before your trip, but there are plenty of ATMs available throughout San Francisco.
How much should I budget per day for extras?
It’s up to you how much money you budget for each day as you know your spending habits better than we do. For reference, an average meal in San Francisco will cost $30-40 and an average drink costs around $8. Around $50 per day should be adequate.
Is it customary to tip?
A tip of around 7-10 USD per day for the Pack Leader would be appreciated but is not compulsory. Many Flashpackers choose to keep a kitty and give this to the Pack Leader at the end of the trip.
For restaurants and bars in California, it's customary to tip around 15%-20% but this alters with the level of service you have received.