How much damage have I caused?

Please help me!

Yesterday, I needed to fill the gray water tank, so I can flash the small gray amount of water before we head back home.

Long story short, darn drain plug! I didn't pay attention and accidentally overfill the sink and got fresh water everywhere on the kitchen floor (3 gal at max),
I throw every towel I got on the floor to absorb the water,
and dried the floor the best I could. (also inside floor cabinets and etc)
The camper is now all nice and dry, no visual water damage (yet)...

BUT!
in the evening, small amount of water (cup?) did dripped under the trailer in one location.
I poke a tiny hole in the Underbelly to help the water drain out faster, and now I am worried that I have caused sever water damage in that area...

So...
How much damage have I caused?
Is there anything else I can do, is it repairable?
This is a new trailer... I feel so stupid.

P.s I live in an apartment, and the trailer is at the outside storage 15 min away.

Thanks.