There are some very simple do's and don'ts about planning your trip:

Do: Plan at least 8 months in advance Buy a good travel guide Stay in the park at multiple stops Prepare to walk a lot Leave a full day for the Old Faithful area Go on at least one wildlife safari

Don't: Stay outside the park or in only one base area Get close to a buffalo, elk, moose, or bear for a picture Plan too much in one day Carry too much camera equipment

Click here for a detailed explanation.