You can see Wishes (and the Electrical Water Pageant) from any of the MK Resort beaches (Grand Floridian, Poly, Contemporary, Wilderness Lodge, Fort Wilderness).
You can get a limited view of both Wishes and IllumiNations from the BoardWalk area.
The problem is that neither is the same without the music. To my knowledge, the only places outside the parks you will get to hear the music are California Grill, Narcoossee's, 'Ohana and the Wishes cruise - it's piped in. I can't think of anywhere outside Epcot where the music is piped in.