Are they easy to remove for sleeping clearance?
Well, yes, they are. But, you may have to do it a couple of times to get it down. Remove or install with the roof raised.
Put a flat blade screw driver in the indent under the steel spring clip and lift up just enough to remove the strut. Don't let the clip pop off. They are difficult to put back on.
When re-installing, do the same screw driver thing with the lower mount. On the upper mount, you may have to push up on the roof a bit, to line up the ball to the socket.
But, I found out Suspa makes a quick disconnect socket end. I am considering these, although I really don't find a problem leaving the struts installed.