In today's world everybody seems to have tattoos. When I was young, getting something as noticeable as a tattoo, nose rings, gauges and such labeled people, for good and bad. In the military, a tat usually was the mark of a non-commissioned officer. Officer candidates weren't accepted into OCS if one could be seen wearing a T shirt and shorts. A PICC line is a little like a Henna tattoo, evidence of having it goes away once it is removed.
PICC lines and ports don't have the identifying stigma just as tattoos have, for the most part, but a port is going to be there forever, in all practicality. I find a PICC something that shouldn't be overly used. In a rare instance of our beautiful anatomy working against us, nerves, Lymph ducts, arteries and veins run close together like multi-wire cables. This is perfectly efficient until medicines get ported through a vein. With a PICC line, extra fluids are essential to keep the concentrated antibiotic or whatever from burning that vein path. Even so, eventually most people begin to notice peripheral neuropathy, because of mechanical trauma of the foreign material of the actual line plus the liquid leaches out and attacks the nerves surrounding the fluid path. A PICC and Port both dump into a big vessel (which is the idea) like a garden hose running into a river so dilution is immediate.
If you see that PICC lines are going to be run in more than just a couple times, or they are staying in for the maximum allowed time, I suggest you talk seriously with your doctor about getting a port. You have plenty of happy troupers who have related their experiences to guide you. I can only speak to why a PICC isn't a great long term solution. CF is becoming treatable but to date no drug cures CF. People often ask me what CF does, or is and what about it shortens our lives. We are walking feed stock for infections.
In a recent paper on biofilms, the researchers chose CF as the perfect home for mucoid transformed microbes. Their study showed that most infections requiring antibiotics instead of the body's immune system to eradicate have transformed from independent bacteria to the hive living in a mucous of their own making. Mucoid infections are hard to treat and most often impossible to treat. Getting the right antibiotic or combination of antibiotics to kill our infection load often requires mainline delivery. I don't see this changing in my lifetime. See what your doctor thinks.
Good luck on your decision, make absolutely certain this is what YOU want,
LL