I had my port inserted under twilight & a local anesthetic, best thing I ever did! My veins are crappy & the blood tests the day before my chemo were way more stressful as they had to use my veins in my arm.
Having chemo through the port is definitely the best way IMO.
Best of luck, and try to just relax, it's a pretty simple proceedure. Be sure to insist on some endone or similar for the first couple of days as you will have a very sore neck & chest & be really bruised for a few days. The hospital will give you Emla patches (ask for them of they don't offer) to put on at least an hour before your chemo. so you don't even feel the needle going into the port.
Best of luck, Cat