Abandoned Business Park at Night

I'm not sure where my brain was last night, but I swear I didn't watch any weird or odd movies the night before. I think I'm just naturally weird. I embrace the unusual. Apparently.
Details of the dream as starting to fade, so I'm going to try my best to remember.
~~~
A group of school kids, taken on a field trip up a big mountain and they unload the kids into this abandoned business park. Lots of business building, and a concrete walkway right in the middle but no one around. The kids are running around and everything, checking things out. Then some counselor says "when the sun goes down, whatever you do, don't be on the grass" and of course, the sun starts setting. As the sun is setting, all these disgusting slimy creatures start coming out of the ground. First their heads pop out, and they look like big bulging rocks from the earth. Then they push themselves out of the ground and they are these vampire bodies running around the place, grabbing the kids and eating them, sucking on their blood, ravaging, etc.
At one point I seemed to be one of the kids, because a woman comes up to me, all nice and sweet. She goes "come here my darling" and I start backing off. She reaches her hand out to me and says "i want to touch you", her hands starts to go towards my legs and I scream. She grabs me and feels my thigh, and her touch starts to melt my leg off.
As I'm melting from what seems to be an acid like texture dripping from these beasts, the sun starts coming back up. The kids that haven't been attacked run into the field trip bus. These creatures start panicking because of the upcoming sun, and so they grab all the remaining kids, and go underneath the ground with them, and go to sleep as the sun is up.
So meanwhile as these things are sleeping - me and some other kids, are wide awake. Under the ground, in total darkness. We see and feel nothing but dirt. We start trying to move out of these creatures arms (they are holding us like babies) and we start whispering to each other on how do we get out of here. Someone finds a doorway the side of a suitcase and we start trying to pull ourselves out of there, even with our bodies all ruined.
We make it outside, crawling in this abandoned business park, along the concrete under a hot sun. We are making our way through the place and then of course the sun starts to set. (short days!)
These things start to come out from under the ground again, and somehow we are hiding from them under the ground. Some are behind the glass doors of the abandoned business centers, hiding and hoping they dont get discovered. Some kids are still in the hands of these monsters, but they must have been converted somehow because they all seem to get along together fine = meaning, they are not being attacked anymore.

I know there was more to this dream, but its gone now.