Some independent chapels are very bad, some are good.
If you don't want to give the chapel's name, who's the priest?
If you feel comfortable with giving the chapel's name, that would be better tho.
Before going, you need to really check it out first.

The parish is St. Vincent Ferrer in Griswold, CT.  It's a mission church of Sacred Heart in Lawrence, MA that was active in the 80s until the priest died.  No priest was named, but there is a brother speaking for the parish and I guess there will be a priest coming by for Sunday Mass.

I DID NOT SAY THAT THE LOCAL NO DIOCESE ENDORSED THE PARISH, just that it sounded like the diocese was surprised that they reestablished themselves in their territory when the newspaper contacted them for information.  The article provided information about the diocesan TLM and Ecclesia Dei priest.

Based on the information you provide and some basic research on the internet, it is apparent that this chapel will provide valid sacraments.

One traditional priest I know of gave the following advice to a friend of mine when the family had to relocate to another State.  He told him that just because a chapel says its a traditional Catholic chapel, doesn't mean that it really is.  He advised the family to attend the chapel for about six months and just listen to the sermons and watch everything.  If, after six months, every sermon is orthodox, the liturgies are orthodox and according to what appears (to the layman) to be correct, and nothing seems untoward, then the chapel is most likely truly a Catholic chapel.

I would give the same advice.