Of course!
As I said to you guys in the RKC group, I would never say don't come as it is common in the US that people do come just to hang out. However, because you won't be recognised as "official" assistants it would mean if you wanted to recert you'd have to go via the normal means of attending L2, a recert or re-doing the entire weekend.
But if re-certing isn't a concern, and for you it's not, by all means come and hang out. It's going to be a blast. The list of participants so far is like an HKC reunion anyway.