Would you send your dog away for nothing? No, you wouldn't, so, you have to set a task for her. The command could be "Search!", "Find it!" to find her toy, and some exclamation like "Ya-ha!" to reach a certain spot and wait for you there.
Train your dog to find her toy in association with particular smell. Tether her to a tree, walk with the toy not very far away and hide it in the grass or behind the tree. Return to her and send her to search with command pronounced excitedly. Help her to find it for the firs time. Few times you tether her - later on it would be solid "Sit" and "Stay" while you are making circles and looking for a place to hide the toy. Then, mark the toy with some smell, play first, then ask to find. Your dog might follow your steps. Mark with the same smell a wooden stick, play first and ask to look for it.Hide the stick before you leave your playing ground and ask to search for it the next day, then two days later, then a week later. Use another scent and do the same, use a few different scents and do the same. Scent a stick and a piece of cloth. Hide marked stick the previous day, and come following day wih the cloth in a glass jar - so your dog wouldn't smell it on you. Take cloth out, let her smell it and send to search. It could be a good idea to have a note pad with you, so you can put down which smell and where you were hiding.
You can combine training with socialization. Children love it when your dog finds their hidden mobile just by sniffing their hands and shoes. It is magic for them, and for her children would be associated with a game.
Reaching particular spot - is not such a complex task. Train your dog to return to the spot marked by laying there an object (your bag, or her leash. She should lay down at it (or on it) and stay while you walk away some distance, stop and recall. Then send her there where is the object. Name the object - say, "Bag". The command may sound silly: "Ya-ha, ba-a-ag!" . Use a second object and name it, train to return to it. Use both objects placed in different spots at once, recall and send to the spot by naming it. Training further - you can send your dog home, so your dog will bring you a message from your wife that the dinner is ready. Training all of it is easier than anyone may think.