Regardless of the type of park you are going to, it is important to dress for the weather. Hypothermia and heat exhaustion are two of the dangers you will face at the park. Check the weather forecast to determine what you may need. Dress in layers so that you can add or remove layers if needed. Rain gear is also important; it is especially important to stay dry during cold weather.
Food and water are essential for survival. If you are going to a local park, food may not be necessary, but it is advisable to bring water, especially during the hot, summer months. If you are going into the wilderness, it is a good idea to bring food as well as water. Protein or granola bars are conveniently packaged and a good way to pack extra food in case of emergencies.
Regardless of what type of park you are going to, it can be useful to have a first aid kit on hand. The kit should contain essentials such as sunscreen and bug spray in addition to bandages, disinfectant and ointments. It is a good idea to keep medications such as pain killers and anti-histamines on hand. Moleskin is good to treat blisters if you plan to be hiking long distances.
If you are heading to a local park, you probably do not need additional equipment. If you are heading into a state or national park, other equipment may be helpful. For example, a flashlight and extra batteries in case you do not return before nightfall, a map and compass in case you lose the trail and iodine water purification tablets in case you run out of water.
Before going to the park discuss safety concerns with your companions and children. If you are going to a city park, this may include educating your children on strangers and what to do if they get lost. If you are going into the wilderness, discuss safety precautions in terms of wild animals, weather conditions and fire prevention.