When you are setting your trap in soft ground, consider using brackets to prevent the T-post from sinking and thus compromising the integrity of your trap set up.
1) lay down some straw
2) use a T-post bracket
3) if the T-post bracket sinks, then use a board and T-post mount
https://photos.google.com/search/_tra_/photo/AF1QipP8KVNB9vOVUFKKjJI8IRR_hkkN25wdElrXwgGF