In Reply to: Anyone wanting to trek Mt Batur? posted by sally on Friday, 15. May 2009 at 11:57 Bali Time:
paying trekkers (unless you're doing a tour), but you do need to take a guide or else face the wrath of the mountain mafia.
If you can arrange your transport to the starting point of the climb, then do as nasicampur suggests and share the cost of a guide with some others.