Here in Easter Washington the spike bull rule had been in effect for many years. I honestly dont know any spikes live but they do and the result is that we have a TON of huge elk. ITs more common to see 6X6 and 7X7 monsters then the small ones.
I personally dont like having to shoot the spikes because its very hard to find one.
THe people who get drawn for branch antler elk love the rule because they get a good chance at huge elk. My friend got drawn and got a 320 6X6... It all works out and keeps herd numbers up.
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...