Hah -- Steve, that's a staple around here! Contains sand (and usually a shovel) to put on the ice when it coats the driveway. Around here, just about anyone with a sloped driveway of any length will have some sand available partway up/down, if they're smart.
amwood, I USUALLY leave mine on for the winter, but occasionally I'll drop it off and put the FEL on to attack a buildup of snow. I'm lucky; I have a smooth concrete floor in my garage, so I drop the FEL and the blower onto one of those steel 4-wheel tire dollies.
It takes me only about 2 minutes (seriously!) to drop off the FEL, perhaps 4 minutes to connect. Blower takes about 4 minutes off and 6 minutes on, but really only because of the extra time to disconnect the electric chute controls. Disclaimer: that's with leaving the mid-PTO shaft and the front quick-coupler on; if you're not going over/into a low stone wall or something like that, that quick coupler can stay right there; it doesn't interfere with FEL operation.