Welcome aboard Creating Memories.
A reasonably newbie here also (with posts anyway) but have read and learnt a lot from reading others advise.
As for weight distribution bars I definitely recommend them. When we first picked up our 2007 16.49-3 we had a 100 series landcruiser and when asked the question of the salesman he said "Nahh... Not necessary behind the cruiser".
Well I borrowed a set and tried it. The difference was so noticeable that I went out and bought a set that afternoon. Improved the braking, handling and feeling of sway with side winds (Heavy vehicles traveling the other way).
Also looking forward to pics of your van as we are thinking of maybe upsizing one day.
Cheers,
David