Oftentimes I end up putting them all in some corner either near my farm warp location (where the farm totem/obelisk takes you), or put down a mini obelisk right next to them. Keeps them centralized and mostly out of the way if you don't like them covering up other stuff
I personally quite like the variety they bring to the farm visually, but I can get not wanting them smack dab in the middle of the farm