Discussion: Which gear to tow in

i have a 2007 ford ranger 4x4 3 lt turde diesle with a 2008 upgrade i have a 1.6tonne vicount nomad caravan they say that the ford ranger has some issue with fith gear i was wondering is this issue going to affect me with a small van or should i tow in forth gear we are planning a 3 month tour of the mainland next year around march this is our first time we have done this and plan to go from melbourne to adelaide the up the center to tennants creek then over to the east coast the home [any ideas as to what to see and where to park at 62 not planning to go bush walking but a nice stroll down the beacxh sounds ok thank for any help.

James, Tas