The situation with regard to parking is a mixed bag in Scotland. Street parking, when it is adequate, is at a premium. In many areas, there are no areas on streets for cars to park, and you may see cars parked on the sidewalk. While locals do that, this has been an issue the Scottish government has tried to combat for years, and there may very well be a complete ban in the future. At the very least, it is frowned upon, despite how common it is, so the easy rule would be not to park on the sidewalk. Car parks will probably be your best bet for parking. You will most likely pay at a machine; some machines take credit/debit cards but many will require cash. Keep pound coins and low paper denominations on hand for parking. Expect to pay at least £2-3 per hour. Car parks tend to have good security, including closed-circuit cameras, but do not leave valuables in a parked car in any case. Disabled parking permits from the United States are only accepted at the discretion of local jurisdictions so check with a police officer before parking. Bring your U.S. parking permit, but as stated before, there is no requirement for Scotland to honor an American parking permit.