I have a Traps 298 guy who rarely ever fails but not sure if i can recommend my method to anyone, as it seems Traps 125 + Light Step works pretty well. If i had it to over again, i'd go Traps 200 maybe tots and change the build to give him more of some other skill.
Confirming: trapped containers don't seem to matter - contents may/may not have bp.
Most players run over the traps to get rid of them. As reckless as this may seem to some of us, i have to say it's probably the most effective method.