The 'recluse is nothing to mess with, can get bad if the bite is not tended to earlt, just ask my ex sister in law. She ignored a bite on her upper thigh, by the time she went in they thought they were going to have to amputate. They were able to save her leg, but it was very painful and my brother had to stuff about 8-9 feet of cotton gause into the hole twice a day to keep the wound open.
Not all spiders are bad though, had one of these little guys living in my MH last year in TX:
He stayed up by the dash mostly, caught any bugs that might sneak in the front door, I would catch a few bugs for him once in a while if he was looking hungry. When it came time to leave I took him out and put him up in a tree.
I also saw a large Tarantula while I was down there, they are pretty common. But the fact that I saw this one crossing the road while I was speeding along at 50 miles an hour impressed me. He was ginormous.
I almost went back to pull a steve irwin on him, but decided not to take a chance of screeming like a little girl if he jumped in my hair or something.
Sorry, got a little off topic.... I agree, watch out for spiders.