Hi I am planning on going up river to Belaga on our trip to Sarawak. I've read that you can get a 4WD from Belaga to Bintulu to save the long trip back down the Rejang River to Sibu Are these 4WD's available on a daily basis as not wanting to get stranded in Belaga waiting to get out? We will need to get straight on a bus from Bintulu to Miri, on the same day we leave Belaga, as flying to Mulu NP the following day Thanks