Could anyone help me as i'm ttrying to get to the Caesars Legion Camp on the mission Nothin but q hound dog but cannot get to it, Does anyonr know how to get to it.

If you've done that already, head to Cottonwood Cove, and take the raft.

No haven't confronted benny yet?

If you haven't you can't get into Caesar's camp. Its a spoiler if I tell you why.

If you haven't confronted Benny yet:
1. Confront Benny at the Tops.
2. Many ways you can do this, I won't get into that.
3. After Benny is confronted, you will be force-greeted by a man in a suit, Vulpes Inculta, he will give you the Mark of Caesar.
4. Go to Cottonwood Cove and ride the raft to Fortification Hill, aka, The Fort.
5. There you are, at the Fort.

You don't have to go to the Fort, there are dog brains at Gibsons Scrapyard (buy) and at the Fiend camp near the Poseiden Gas Station west of South Vegas Ruins West Entrance after a fight.