I f I am experiencing leg cramps does that mean I have poor circulation?

Not necessarily. Cramps, tightness or "charley horses" during walking or activity might be intermittent claudication. This is a symptom common with pad. Cramps at night or during periods of inactivity that improves with walking is unlikely pad or poor circulation. Discussion with your physician may help further determine what the issue is.
Not necessarily. Cramps can be a result of many things. A good physical exam and determination of risk factors is essential to determining the cause.