i think you might wake up in time to think to yourself:
"fuck, i wish i'd kept my gun clos........"
seriuosly, though, personally, if you are a deep sleeper (as i am), i'd come up with some other way to make sure you wake up. some ideas:
1. get a dog
2. get a parrot (i've heard they are more sensitive and make more noise than dogs)
3. electronic alarm system
4. homemade perimeter alarms (e.g., fishing line trip wires attached to one of those cheap window alarms that go off when two magnets get separated...or even just attached to a bunch of tin cans that will rattle against each other).
my bedroom is also a strategic mess
i've got boxes of books, random pieces of furniture, and other knee high junk scattered around in there...if you don't know where to step, you're gonna make a serious racket and probably end up falling down trying to move around in there in the dark.
(i, of course, did not do this intentionally...i'm just a bit of a pack rat...but i think it really would buy me some time if someone actually came into my bedroom at night.)