I found spring poles pretty useless here because the poles take a set if they are green and don't straighten up again. If it is cold out they freeze into the shape you bent them to too.

Figure 4 triggers work OK for small deadfalls. They are nicest if they are cut ahead of time in the shop and carried to where you are setting. They are not hard to make in the field but when you are setting traps it pays to make them ahead of time so you don't waste more time out on the line than you need to. Time out on the trap line is better spent preparing the sets than whittling the triggers.