You can use a long line if there are issues with having the dog free.

Also, check www.meetup.com to see if there is a dog play group near you.

Around here, the dog parks are "controlled" by the large dogs. Small dogs like mine don't fair very well, and at times, do get killed. So we stay away from them. I found a small breed group on meet up, and I know a few places we can go walk where my pups can be free AND safe.