First time water leak.. Advice

I'm at a campground and this morning I noticed water coming out of the bottom of my AS.. It's between the two tires on the street side. It's a heavy drip, but not quite a stream. On the inside it's a little damp under the set is drawers beneath the microwave.. I have a '91 Excella...



I'm a newbie to RV's and don't know what to do. Is there any advice that you can give me on tracking down this leak?



Thanks,

Vickie