And yes it would be a criminal offense to trespass on this property or any other property where you do not have permission of the owner. Often the auction companies have Open House opportunities to view the property. Otherwise there might be an agent you could contact to view the property. The owner or their agent would be responsible for contacting the tenants regarding showings.
If you contact me at 401-269-6169 or email me at firstname.lastname@example.org and tell me the property address, I will get you in there to take a look this weekend. I deal with a lot of buyers on foreclosure properties, have a little background in construction and would be happy to help you with this one. Hope to hear from you.