We had our DS's 1st birthday party in a park and just took some plastic seats & umbrellas, it worked really well! We also made sure we had some rubber backed mats for the little kids to sit/lay on and had 'kid friendly' food. Friends took photos and video footage for us and it was the perfect day!! We enjoyed every minute of it and so did DS!!!

Don't worry about games but if you've got older kids at the party then it's a good idea to be near some playground equipment.