Tour operators regularly conduct tours into these reserves.
On offer: A gruelling 8 hour bus ride(both ways) to: 1) Catch a glimpse of the Jarwa people.(note the bus does'nt stop so all you get is a passing glance) 2) A boat ride in the mangroves (Around an hour) 3) The limestone caves(Supposed to be one of the few of these in India) 4) Mud volcano(Not worth it)
Price: around 400 Rs per person inclusive of food and water