Well, If it was me that you were taking on a picnic, I would be cautious if I thought you were going to a lot of trouble,
So put some really nice smelly stuff on your bod, "Givenchy por homme" is my choice! not too much.
What if it rains? have you got a plan B.?
Just have some really nice cheese, only a few will do , hard,soft and flavoured. Nice crackers in their box.
a knife, a tablecloth or throw to serve it on.
A nice sparkling champagney type of wine, makes my cheeks flush without sending me stupid! you can also pack a small can of peach or apricot nectar to mix with it.
Then just a KFC or other prebaked chicken pieces with a side dish. remember you arent going to too much trouble, save that for the Proposal!LOL
Then some handwipes in a small dispenser.
Now if you go in the evening and things are going very well you may want to have a emergency Candle in your car emergency kit!
Then most important is to dont try too much to impress, as us girls are pretty perceptive, dont bring up any baggage or talk about exes. Just be happy and humour her. if she isnt into chickens, dont talk about them too much!
If she talks about herself then you know she is comfortable.
If it was me and we both Jelled well I wouldnt need much food!!!
Let us know how it goes.