To add to the excellent advice you've gotten already,

Most here have advised a stripping basket. If you're borrowing gear, you don't necessarily have to worry about one. With a floating line you don't need one so long as you're wading. However, on the beach your line will get covered in sand without one, and sinking lines will become impossible to cast far because you need to pull the line out of the water each time. I use one most of the time, but on a recent trip I opted to not drag it along and found I didn't miss it.

If you're not used to casting heavier rods and big flies, might be worth practicing a bit before worrying too much about catching fish.