Both deathclaws are level 20 so come prepared! Deathclaws move fast and hit hard, so engaging them one at a time is definitely ideal.
You can try to avoid a fight but chances are one of those deathclaws wont be to happy about you searching through her nest. In order to get access to the bunker, you will need the Bypass Holotape which is located in the deathclaw nest to the left when facing the elevator doors. Remember those will have to get a little close to them now.