1) Picnic & Photo shoot.
The idea here is to have a little picnic somewhere special, but during meal capture the moments, the laughter by snapping pictures. With phones being cameras now it's not like you have to remember "the camera." Also, after you finish eating look for some cool areas to snap off some cool pictures to share on Instagram.
2) Picnic & Poems.
This idea is simple, only a little pre-planning before the date (or have your smart phone handy) bring some poems you feel communicate what you might want to say to your partner ... during the meal read them to each other.
3) Picnic & Massage.
Easy, just eat and rub. (That sounded weird! ha ha!) A nice neck and shoulder rub after you eat, or feet and hands ... you can figure it out.
4) Picnic & Kisses.
There's nothing more romantic than kissing ... so be intentional about lots of kisses, throughout picnic, after, on the way home ... and the kisses can be on the arm, the hands, the feet, the cheek, lips, behind the ear ... you get the idea ... keep it Rated PG though, especially if in public.
5) Picnic & Dreams.
This will take some prep, at least some pre-thought prep. Take some time before this picnic and really think about what your dreams are. Where do you want to live? What do you want to do? Where do you want to travel? What are your dreams? This is a fantastic way to really get to know someone! Critically important if this person is a potential life partner. You want to really know them ... and knowing what someone dreams about let's you in their heart.
One more for fun:
6) Picnic in Paris (or wherever you wish).
The idea here is themed picnics ... pick a place you want to go and make sure to bring food specific to that place, maybe have some pictures pulled up on your phone, read some facts and insights to "the place" and dream of being there, and if you are really good even do the accent. That would be impressive.