You’ll be coming here anyway, so worry not, but this place is really incredible, and worth spending time wandering through on your own. Their collection is huge, goes well beyond Donald Judd alone, and is on par with any of the other Dia properties around the country (it used to be owned by the Dia Foundation back in Judd’s day before getting bought out). We especially like the hangar with all the Dan Flavins.
We did a full tour of the collection, which is worth it, or you can wander around the Judd collection on your own. Check their calendar to reserve a spot on a tour:
Hours vary but are essentially Wednesday through Sunday 9am – 4:30pm for self-guided viewing (limited portions of the collection). Check the website for more info.