Deal done, caravan to motorhome

Hi all, been caravaning for a few years now and purchased two new caravans in the last 2 years. We have now decided that a motorhome is what we really want.

Take delivery of a new Elddis Platnium Edition 196 on the 12th May. So I am now a newbie again as I have never owned a motorhome. 

Any advice or tips would be greatly appreciated.

Just a couple of question for now and it may be obvious but I'm not sure. When setting off from home do I fill the (100 litre) fresh water tank or part fill it. When on site for a few days do you drive van to drainage point on site to empty the grey water or stay on pitch and empty into wastemaster or similar.

thanks in advance 

Dougie 👍🏼