Tour operators are pretty expensive, the best one for Scotland is Perry Golf. They can take care of everything, and I mean everything. Airfare, hotels, tee times and a driven bus to get you around. Caddy fees are usually extra. For 5-7 days plan on over $5,000 per person!
In Scotland you can do pretty well driving yourself (standard transmission cars on the other side of the road!) and small hotels are pretty reasonable. There is a lot of great golf that you can book yourself and not spend all of the extra booking fees through a tour operator. The only real tricky tee time is the Old Course, but it can be done. The locals will also send you to all of the good pubs and restaurants if you ask.