If you talk to the Department of Natural Resources they will tell you that the ice is never 100% safe.
You can be standing on 6 inches of ice and have it only 3 inches a few feet away.
Wearing some kind of flotation device is a great idea. The kind that auto inflates is a great way.
There are also things to wear to help you get back on the ice.
Taking the advice of the DNR or other agencies about the safety of the ice is a personal decision.
What ever you decide, decide wisely!
Remember, play it safe.