Never do an inspection alone or without their consent if they are occupying or have some stuff in it.  

Revocable trust are great for privacy but usually don’t provide any asset protection by themselves.In most state, you will have to disclose either the manager and/or members of the LLC in its published articles.

Would you submit a rental application and consent to a background & credit check?

My guess is your position will be hard to defend with this type of tenant reaction combined with no written documentation of their consent.  

@Wesley W.Where's the screening step in your process ... where you pull the applicant's credit history (consent form signed as part of application) and run a background check?

Here is a link to my blog about renting out such RE. https://www.biggerpockets.com/member-blogs/12388/86773-renting-real-estate-without-the-owners-consent-isn-t-that-fraudAnd here are links to a couple short videos that discuss the demand, at least here on the West Coast, for places to park RV's.In the San Francisco area, https://www.youtube.com/watch?

A gate does not constitute an easement, it may imply consent, but consent may be withdrawn any time.

Provide a copy of this to every applicant and have somewhere on your application stating that the tenant has received it and has reviewed it with a signed consent.

If you do allow it, just be sure to explicitly state on the lease and explain verbally that they are allowed "2 Guinea Pigs" only and that any other animals are prohibited without your prior written consent.

Just curious, was there a clause in your lease agreeing that the tenant could make alterations and repairs without your consent or was this an implied agreement?