You should be able to hit two different spots in the crook.
The basilic is generally easier and more 'popping out' than the cephalic, but I am referring to where the basilic splits into the median cubital vein as the second spot you should be able to hit. The cephalic seems to be deeper in most people, although I have certainly saw some bulging ones, but that seems to be more with people that work out a lot.
NSFW:

The basilic is generally easier and more 'popping out' than the cephalic, but I am referring to where the basilic splits into the median cubital vein as the second spot you should be able to hit. The cephalic seems to be deeper in most people, although I have certainly saw some bulging ones, but that seems to be more with people that work out a lot.