yah it's pretty much best to go with a friend/friends. it's also creepy as fuck, and the last time we did it we almost got arrested but we ran fast as hell!!!
hahah that happened to me. some friends and i went to go explore an abandonned psych. it's so creepy. a lot of people got fined for doing it. while we were there we saw someone with a flashlight and assumed it was a security guard. we foudn a back door that was like.. 6 feet from the ground that lead to a back field. we ran through the most lumpy, muddy, painfully sharp weedy field to our car. i fell so many times into the mud. we were all SO dirty from it!!