I visited Mulupark in Jan'11 with my wife and three year old daughter. We flew Air Asia from Mumbai to KL. We stayed overnight in the LCCT and took an early morning flight to Miri. A half an hour flight from Miri took us to Mulupark. If one can split the travel, the journey would be less tiring.
Mulupark is a UNESCO World Heritage site and the National Park is run very professionally by the Park Authorities. We had booked through email and confirmed multiple times (We were apprehensive after reading some reviews that email bookings don't hold good). Our check-in was pretty smooth. The guide on the counter made sure we understood everything. He helped decide itinerary for the three days keeping in mind our interests and our limitations.
On Day 1, we went to Clear water Cave and Wind Cave. The Cave walk is a guided tour at a pre-determined time daily. One has to book in advance. There are illustrations along the way which explains the eco-system, history, geography etc which are quite informative. One can wear floaters/shoes and carry water bottles. It gets very hot and humid inside the Caves.
In the evening, we went to see the Bats. We were lucky. The weather was just about right. It was sunny and had not rained in the afternoon. We could see a steady stream of Bats coming out of the Caves. An estimated 2 million Bats come out of the Deer Cave every evening in search of food. It is the most unique sight I have seen in my life.
On Day 2, we went for the Canopy Walk. The Canopy walk is about 25-30 Mtrs from the ground and takes about 2 hours. A guide accompanies you on the Walk and they are very informative. One can appreciate the flora eco-system of a rain-forest from atop. We saw a small snake and a pygmy squirrel.
We went to Deer Cave and Lang's Cave in the evening. The deer Cave has a very huge opening - it looks straight out of a Harry Potter Movie. It has a peculiar smell of Bat droppings. It is the biggest show cave in the world. We found natural showers named 'Adam and Eve' inside the Cave.
The Weather in Mulupark is quite hot and humid. It starts raining late afternoon and can sometimes continue into the night. Since it rains 300 days in a year , the ground is always wet and marshy. One will find wooden planks to walk 2 ft above ground-level everywhere in the Park. The place thrives in varieties of insects. We saw a small variety of snake thrice in our 3 day stay.
We stayed at Deluxe Long House. The Room was quite spacious. The bathroom and toilet were clean.
The Restaurant appeared to be good. It had a fixed menu. Since we were vegetarians, we had very few choices. The store adjoining the Restaurant has toileteries, snacks, T Shirts and gift items.
The people managing the Park were quite helpful and the guides were very knowledgeable.
For an uninitiated like me, Mulupark was an excellent introlduction to Rainforests and Caves.