When I first came across the novel idea of having a picnic reception, I wasn't quite sure many couples would opt for this untraditional style of entertaining, but I was pleasently surprised. With this being an incredible cost saver, couples have opted to have a full on wedding picnic reception, or incorporated this idea in their wedding "cocktail hour" - normally the hour in which the guests are entertained whilst the couple have photo's taken.
Either have individual picnic baskets/boxes made for your guests or have a buffet table where the guests can help themselves to some snacks.
If you are thinking of making many things yourself or wanting to personalise plenty of items at your wedding, then this is also the route to go. If you don't fancy having everything picnic style, then incorporate only certain aspects to give it the same feel.
Have some blankets or scatter cushions on the grass and put up a few parasols for some additional shade if need be. You can even go as far as providing outside entertainment for the guests such as croquet.
for Perfect Day - The South African Wedding Directory