If the range will allow it, I like the old chair drill. Get a standard folding chair, open it up, and shoot around, over, under, and through. A few rounds squatting position fired over the top of the chair. A few rounds from the right side kneeling. Right side prone. Under the chair. Kneeling/squatting/sitting through the opening in the chair back. Same thing on the left side.
That doesn't address your movement issues, but it offers a lot of work with concealment/cover techniques, shooting positions, etc.