Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: And then a few of us slipped out early to set up the picnic in Princes Street Gardens . The catering was done by Valvona and Crolla , which is apparently the best deli in the UK - and I believe it , because everything was SO good . It was nice for all of us to be able to share one big picnic together - I think it 's the only meal we ' ve eaten together since the first night here .

Question: What may be the reason they slipped out early ?
The park gets crowded as the day goes on .
To set up the picnic.