So stoked to have survived the Inca Trail ! Be prepared for a tough tramp but also a great time. The tour was incredibly awesome, great guides and people and the porters are champions. Also have legs of steel now which I'm not complaining about.
Second day is probably the hardest, lots of uphill so practice those squats and leg press beforehand, but I found the downhill the next day the hardest. Toilets are a bit gross but all G. You are camping so it's good to rough it a little. And makes coming back to toilets with seats and without explosive diarrhea pretty great. Overall I totally loved it. Do it.