I am planning a day trip from Kuala Lumpur for one person. I am looking for the cheapest way to do this. Organisations tend to be expensive for single travellers and won't allow me to join someone else. Another possibility is to do a 2 day-tour and ending up in Penang.
What do you recommend? My compliments for this very informative site!
Usually tour companies are still the best and cheapest than doing it on your on. There are many tour companies in KL so look around for one suitable for you. That's what I would do. I have done this method in Bangkok, Melbourne, London, and it has worked well so far.