I need a few quick details so I can design a safe, realistic 6‑day plan that suits a 40‑year‑old and an 88‑year‑old: Are you fixed on driving the entire way from Mumbai to Haridwar/Mussoorie, or would you consider mixing flight/train for the long northern stretch to avoid excessive driving? Also tell me your preferred nightly driving limit (e.g., max 5–6 hours/day), any mobility/medical needs for the 88‑year‑old (stairs, wheelchair, oxygen), and your desired start date.