Most places, you're on your own. You can go to any grocery store and buy supplies or you can scout for a restaurant. You'll find it's significantly cheaper buying groceries than eating in restaurants. You will find that most places refer to hostels as a "bed and breakfast," they often include a breakfast. Although the definition of breakfast will vary from a donut + coffee to eggs, pancakes, bacon, juice, ...

The cost of a B&B varies a lot with location. Also depends on what kind of amenities you require. Same with camping. Also depends on when you camp. Don't even think about getting a site around July 4 without a reservation!

About tipping- a good rule of thumb is that you should tip about 15% of the total bill for any meal that is brought to you by a server, 20% if you want to reward the server for excellent service. 10% is considered undertipping. I normally round to the nearest dollar.

Never tip at a fast food joint (if you're inclined to eat at one).