To dream that you are at a picnic signifies a joyful and tranquil domestic life. You prefer the simpler things in life.
To see a picnic basket in your dream indicates an opportunity to share your ideas and opinions with others. You are receptive to different viewpoints.
To see or sit at a picnic table in your dream symbolises unity and togetherness. If you are under the picnic table, then it points to some disagreement that is not being properly addressed or resolved.