Im trying a 100% casears legion playthrough, but im afraid that if i go against the NCR and make them my enemy i wont be able to access the strip nemore due to them guarding it with bots.

They appear to be everywhere, and if i piss them off i fear my choice in destination will be limited.

If youre deemed villified by NCR, can you still access the strip?

Yes because the Securitrons (the robots) are actually owned by Mister House, which is not part of any faction.

Yes you can. I went independent on my first play through and the NCR didn't do anything to stop me from accessing the strip. Maybe because of my army of robots standing about, or them being unarmed, or being drunk, or busy looking at the girls in front of Gomorrah...