You must go back. I visited Wellington's and Napoleon's headquarters plus various museums showing weapons and uniforms. I also stood on the spot where General Picton was shot dead. The lane that leads to Chateau Hougoumont runs left to right across the very top of the battlefield with the reverse slope behind it that enabled the British troops to lie down and shelter from the the French cannonade coming up the slope towards them. The large mound with the lion on top was erected by the Dutch much to Wellington's annoyance when he visited many years later.About ten years ago I was part of a coach party set to do a tour of Waterloo Stuffy but there was an accident pileup and diversion in the area so all we got was half an hour in the place ,
Never did get back there again sadly.