I've found that a mere 50 yards can mean the difference between getting the shot and not. It doesn't hurt as far as Im concerned to have stands close together. Most boils down to what the deer are doing when the season rolls around. Where Im at you may find the deer going past a location all Spring but then move that pattern 50 to 100 yrds. away one the pressure starts. The worst part of having multiple stands is patterning them on one and only to have them move past the other. So, no I dont think you can have two of them too close together.