If you visit Mount Athos, you will walk almost everywhere, and stay and eat at the monasteries you have come to visit, which certainly simplifies things. "Simple" is a key word here -- both your accommodations and food (Athos is a vegetarian's paradise) will be very basic, and usually only one meal a day is served. You may be cheered to know that the wine made on Athos and sold throughout Greece, including Tsantali white (not all of which is made here, despite its labels) is particularly refreshing. The Metochi Mylopotamou vintage made at the Great Lavra Monastery is also well regarded. Keep in mind that although most monasteries will not accept direct payment in cash for food and lodgings, you are expected to make a donation in the monastery's church.
As always, when walking in Greece, keep in mind the danger of fires, and be sure to dispose of any matches or cigarettes with care. Also, do not show up at the monasteries in the afternoon, when the monks are taking their siestas.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.