I like a 3/8 oz Dirty Jigs Swim Jig because of their vast and detailed color selection. I like 3/8 oz because I can use it in a variety of depths and I can make long casts with it.
My favorite trailers for swim jigs are Rage Craws, grubs, or Lake Fork Magic Shads depending on how active the fish are. For trailers, I tend to go with a grub in cooler water or when the fish aren't super active, a craw when their somewhat active or in the later stages of the prespawn period, and I use a swimbait trailer when the water is warmer during the summer months or when the fish are feeding.
However, if one trailer is not working I will experiment with other trailers and retrieve styles until I start catching fish.