Ay well thank you very much, and do not know how much it would cost to stay 2 days or 7 people
If you can take food! There are family lockers where you can leave everything you bring, they cost US $ 20 a day. Yes, there are places to settle down to 7, especially if you arrive to the park openly because you will have more and better chances of finding chairs all together and hopefully with sunshade. I do not know about babies :(
Thanks! Your answer is awaiting moderation.