Having a rink around here to yourself without paying 100-150 bucks just doesn't happen, I'm envious. I always liked being alone on the ice though (end of practice or shinny or whatever for a couple minutes until getting kicked off). The suggestion above of throwing cones randomly all over the place and stickhandling around them is one of my favorites, except I use(d) pucks.
Of course, I never got tired of ripping slappers at the empty net eitehr.
Of course, I never got tired of ripping slappers at the empty net eitehr.