Most of the trub will be below the line of the spigot. If you want to try really hard, put a rag under the front of the keg so it leans back a bit. Let it sit for a day like that and the trub will flow to the back. Then bottle and the first 3 bottles will not have any in them. To get to the last of the beer, you will need to put back to normal position, but you can mark that one if you like. You will get sediment no matter what when you bottle condition, and the trub will just be on the sediment, so most don't worry about it. It is more in the pour and leaving the last bit in the bottom of the bottle than in the keeping the bottle clear.