she will look to climb, usually the highest she can get. Babies in the wild will seek a tree or bush to sleep and will climb up to the top of it. They are very fast and very good climbers.
If there is not a tree around, they will seek a fence or some other structure, its their survival instints to go high. They also rarely stray very far on the ground, others that have lost them and find them do so within a few houses if not right next door or your yard, even if weeks later.
Now, to catch her if you can not find her. Get a wire crickets keeper or something like that, that is designed to keep crickets in so they do not get out. If you do not have one, check bait shops in your area or call Armstrongs Crickets tomorrow and explain to Jack or Dave why you need it and who recommended it. This is what I am talking about on in the thrid row qith the red top ands bottom
www.armstrongcrickets.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=ACF&Category_Code=CTC
Place the cricket keeper with some crickets in it on the ground near the area she was last seen or where you think would have been her exit area. Babies have amazing eye sight and even up a tree she will spot those crickets when she gets hungry and they also hear very well. you can even use a large glass bowl as long as she has a way to climb in and not climb out.
IF she is getting sun in the trees or fence, she may not come down for a few days. Remember, she has all the moisture she needs and this time of year probably all the food she needs available to her naturally, so don't give up hope if you do not find her right away.
Good Luck!!