CIPA mirrors made for your tow vehicle should work fine.
Get good quality sewer hoses and a water hose that is rated for drinking purposes, not just a green garden hose. They are usually white and say something like "safe for drinking". If a sewer hose came with your trailer it is probably cheap. Good enough to use for a while but it will soon get holes in it which can, as you might expect, cause a few stinky problems.