another way is to roll the tob acco out and leave the filter in
then start stuffing your weed in and use a pencil or something to pack the weed against the filter
when you've got a full J thats tightly packed ( i rolled 2.5gs in one camel) roll the end off and pull the filter out.
good thing to do instead of a roach is just leave that paper on where the filter was and there is no weed, scrunch it up into a star shape and light away