Wireless mouse should work fine. I prefer a radio-frequency wireless mouse (such as those by Logitech) rather than a bluetooth mouse.
As far as keyboards go -- I prefer a WIRED keyboard, especially one with a couple of USB ports on it.
Some people using wireless keyboards have reported problems during bootup, when trying to use the various key combinations that can be used during the boot process. You won't have these problems with a wired keyboard.
I still use an older MacAllay keyboard with larger shaped keys that resembles older IBM and Mac keyboards. I prefer the old-time feel. I plug the Logitech mouse's receiver into one of the keyboard's USB ports, and it's a great combination...