99/100 times i'll use a trailor, for me my favorite size jig is 1/2oz for flipping and pitching, i useally fish mine with a matching zoom super chunk, in cold water <45 i go to pork, my favorite colors is green pumpkin, but my old stand-by is black and blue, for fishing deep grass i like a 3/4 - 1 1/4 oz to bust thru and get below the "canopy" of matted grass. my biggest weakness fishing a jig is "swimming" a jig, i guess because i have the least confidence in this method, i still like to match the hatch, and i have caught and collected crawfish, most were red, dark brown, green, and almost transparent, i have also fish white jigs with a white trailor, so there have been a bunch of varibles[&:], if you have low confidence in a jig take about 4-6 in green pumpkin with a matching zoom super chunk, pitch it around every lay down you can find and you will catch fish, but be ready, hits can be like running over a brick with a lawnmower or as subtle as feeling nothing, maybe just your line moving. be ready for anything, if your not sure set the hook, oh yea use a jig with a good weed-guard

as far as jig trailor colors, mix it up try a little bit of everything, i caught an 8 1/4 once during the winter, i had ran out of "uncle josh" pork frog trailors and i switched to the only thing (pork) i had left, it was a strike king "bo liz" a pork lizard that is about 6-8" long, i never thought i'd catch the fish i did, as i fished this rig kind of half jokingly[&:], but like oneshot mentioned a big bait and a big profile may not get a bunch of bites, but when it does it will useally be a good one[:-]