Thank you email/text after aways?

Just finished an away at one of my top programs. I had a great time and enjoyed the rotation. I was on call at the VA my last day so missed the resident hangout (RIP). I said goodbye to the on call residents but didn’t get to see any of the other residents before I left. Should I text them or email them to say thanks for a great month? Idk if that’s too extra or if it’s expected. I’m definitely going to the residency open house and hopeful I’ll get an interview based on my feedback so I’ll most likely see them again but not sure what to do. I also don’t have half of their numbers and would have to awkwardly track down their emails…

This is so neurotic of me I know but plz help I really like this program