Halo5lfg.com is a great website to find people to play campaign or multiplayer. It is the sister site of destinylfg.com and I have found many good raid groups using it. Trying to make this site more known and increase its community.
It is easy to use and sort what team you are looking for or post who you need. You can direct message people on live with it too.
keep this bumped so everyone can see 