Barn speakers


We have a small farm with a large barn for weekend family get togethers. Trying to figure out how to pipe music around. Much of the time we are out around a fire. Options I am considering are indoor and outdoor speakers hung up high, not sure of a brand. Another consideration is a box speaker like Klipsch that can be moved in and out- kind of a hassle but workable. Listen to everything from Earl Klugh to AC/DC and everything between. Anyone have a similar setup that works well? Thank you in advance 
ovinewar1
Thanks for all the responses. Some type of powered speaker makes a ton of sense so it can be controlled from wherever the gathering is happening. Might even look at some raspberry pi amps hooked up to an interesting horn speaker. Thanks again. 
I thought this was going to be a barn find of still-in-box Bose 901's from 1968.