help with shrimp

[Ratdog]

hello again!

well last night fishing trip sucked with fog etc. soooooooo.
looking for shrimp this weekend. i hear a guy can put a 12 foot trawl on his boat and hit shrimp in s.w.pass. soooo my q's partain to where is best to put in and at what point in pass can i put my drag out.

mama likes shrimp and this is all for her ....lol me to cuz i ant never done it.
my new 12 footer i am positive will work good but just don't know where to start it how long to drag it and what i can keep that winds up in it.
i hear you can sometimes get crabs flounder etc.

so please if u know any insight it would help.
mama wants a shrimp poorboy!