First about your trip read the latest travelling experience for the same destination, familiarize yourself with the culture and customs with where you are going, take only essential things with you, Avoid unnecessary items like excess food too much of eatables, bulky clothing, heavy items.
Some most Important are :
Take out travel insurance to cover any emergency such as hospital treatment. Make copies of your licence and licence details, insurance policy, Make a list of traveller's cheque numbers and credit card numbers, Consult your doctor regarding any recommended vaccinations and necessary health precautions to take whilst away, I recently completed my journey in all over the India with my with friend in my Bmw 3 Series
, so went with these all essential things.
And as you are completing 20k in 13 days than its good because much driving is not good within a day you have to save time for enjoy also.
" bon voyage " for you journey