For the best connectivity, range and listening experience while stereo paired, keep in mind these points below, especially elevating:

• ELEVATE - putting your Turtleboxes up on a cooler, table, etc. will dramatically improve the connectivity.  Bluetooth works best with a clear line-of-sight, so grass or a very slight rise in elevation between the two Turtleboxes can affect the connectivity. 
• BACK THEM UP - Place both Turtleboxes beyond the outer edge of the party, where people are not standing between them.  This is also best for the left-right stereo imaging.
• SLIGHT ANGLE - Angle the Turtleboxes so they are slightly turned towards each other, you want both speakers pointed directly at the middle of the listening area.  Imagine yourself standing in the middle of the party and turn each Turtlebox to face you directly.