Coweeman access would be through Headquarters,Ostrander,Rose Valley,or even the Kalama river or Spirit Lake Hwy,just be carefull to stay out of the Toutle.As far as gates go they have been pretty much opened this year,in years past they had been a pain,where you could actualy drive to both sides,but not through them.Camping is prohibited on Weyerhaeuser property,which is most of the Coweeman unit.As far as camping goes there is Seaquest as mentioned,or Silver Shores abit further up Spirt Lake Hwy.In the Kalama area there is Camp Kalama just off I-5 at the Kalama River exit.There are useualy a few campers towards the end of Headquarters road just off to the right at the 020 road,they set up camp just before the rail crossing,this is usualy during the modern season,not sure how popular the spot is during muzzle loader season.If you choose to hunt the Rose Valley area I believe you can camp along the road before you get to the Weyerhaeuser gate on the 1600 rd this is state land and there are a few pull outs wide enough for a trailer,the old CC camp is still there as well but the access has been trenched so it would be a tent camp only.