If it is not accessed, you can do anything you want. The only consideration would be to avoid direct impacts (ie don't let it get hit hard).
If you are not using it, it will need to be flushed 1x/month. All you will do is access, push a syringe of saline and then heparin, and then de-access.
When accessed, you will need to avoid getting it wet, but otherwise again just protect from physical damage. One of the nice things is that, especially once you learn to access yourself, you can de-access for a shower, swimming or even 'personal' activities and then just re-access before your next dose. Depending on what you are taking, you can get up to 6-8 hours of a break.
You wouldn't want to access for each dose, but over a course of 2-3 weeks of IV's, there is no reason to not take breaks w/o it so you can live. That is one of the best features is you aren't stuck with it dangling from you for weeks. In addition, no more need for PICC insertions. I would strongly suggest learning to access yourself (it is not hard) and you can then be independent and even travel while on IV's without worry.
The only drawback that I can really think of is that accessing/de-accessing MUST be done sterile. That means glove/mask and sterile technique. We won't let anyone other than my wife/I and a couple of nurses we know very well access either of our boys with one. I've seen too many nurses with sloppy technique and a port infection is to risky to play with.
If you have any questions, just shoot. There are several here with them.