Most of my muskrat are caught on the rivers and creeks. Bank pocket sets are the most popular of all the sets. Even with all that swimming area, a lure will call them into your set.
Marshes usually offer a feed bed situation.
This is where a lure really pulls them into certain directions. No matter what lure you use, or what trap you set, always use a glandular lure. Pocket set, or blind set, a mink gland used sparingly will offer you more catches. A good dirt hole set can't be beat for coon. I stay with the sweet baits early.