I did 3nights 4days trekking with Inca Trail Reservations company. I just recommend here.
First, they provided lots of equipment for trekking. So instead of buying stuff, you can borrow. Second, after starting trekking, they provided meals and tea everytime. And there is 'happy hour' . That is snack time before meal. I loved this time. Food , snack and tea was really nice. Third , if you are not good at trekking, you do not worry about this one.
I fell behind with my friend in my team. But guide waited and helped us. What ever this experience was the best in my life.