AlanH
most info. has already been covered but I would add -
make sure you hold the door open and keep it open 'till your wife is settled.Unless you purchase the Librands aftermarket door stays the door has a nasty habit of closing and trapping your (her) leg!
Similarly don't park on a gradient where the door wants to close....
If your wife is like mine, make sure they have prepared for messed hair if you are driving top down (which I would recommend).A hat, scarf or whatever is essential.
If you are hiring, try for the heated seat option to give a good impression.
Obviously,a good weather day is a bonus - a cold, crisp and sunny Winters day is ideal; choose wisely...!
Hope this helps and good luck

James