Hi this is my first post! We have a hilux 2012 model dual cab and a 16.49 1 expanda. We are off for a 6 month trip around Nt & wa and I want to take 3 bikes with us. Has anyone considered putting the bikes on top of the tow vehicle? I've read other posts about putting the bikes on the front & back of van & the disadvantages of each. Any feedback/ideas appreciated