The trip from Tokyo to Mt. Fuji takes about 2.5 hours, provided that we don't hit any extraordinary traffic, which we usually don't as long as we avoid driving on weekends. On the way to Fuji, we'll usually stop at a highway convenience store to get some last minute food, water and snacks for the trip.
During the In Season 2-day Mt. Fuji tour, 2 hot meals (dinner and breakfast) are included, but you'll need to bring your own water, snacks, and lunch with you. On the way to Fuji is your last opportunity for these supplies!