I recommend a port. Especially if you have had an axillary clearance. As it is highly recommended after that surgery not to use that arm for any needles or blood pressures etc. That arm is prone to infection and Lymphodema. My best arm for bloods was the one I now protect. The other arm does not have good veins.
So, because I have preserved those veins. They are all I have other than feet etc. I don't know how well veins recover after many doses of Chemo, especially if only using one arm.
Perhaps if you don't have an axillary clearance, and therefore have 2 arms to use and also have good veins, a Port would not be necessary. Of course this is only my opinion.