I don't know anything about the mini's but if you want to get a good quality customizable electronic caller , get a foxpro there very good, on the other hand if you want to be able to vary the sounds and dont mind practicing and learning,then i would buy a couple mouth calls maybe a dvd or two. to help you learn faster.
good calls ( Randy Anderson calls, and even very simple distress calls such as:the rabbit in distress circular call)
When placing a trail camera don't just look for a well used trail. What you want to do is look for a freshly used trail off by itself that goes from a north facing ridge, thick forest, brushy knob or some other similar bedding area to a food source. Don't forget water sources. Especially in the summer months the deer need water so look for a good trail going down too a creek surrounded by thick cover and place the camera 100 yards up from the water source.
Scent control is very important...