Don, about the only thing I can offer is the experience from a long time friend of mine. He's been on the 'beginner's' dose of meds for about 18 months with no dizziness or other side effects. I'm not certain which med he's using, although he's mentioned dopamine.
He claims to have a mild tremor at times, as well as what he describes as scuffing/dragging the bottom of his feet occasionally when walking. I didn't notice either last time I was around him, but it's been a while.
His doctor stressed the need to keep his legs in action, and strongly suggested a stationary bike. He purchased one about 4 months ago and believes it's helping with the issues when walking.
Hope this helps.