Nathan, with all respect, I don't think that it's completely right to say that they will never cause any problems. I understand what you mean, as far as bp's or kings go, but there could be problems if one excapes and finds its way to a room where someone who is afraid of snakes resides. It could potentially cause a huge problem that has a ripple effect in the hobby.
Now for my answer to the question, just be creative. You can get a few underbed storage bins, and one or two of them could just happen to hold snakes. If you are using a tub enclosure, there are a number of places to keep it without it being in view of any potential company. Hell, you can keep a tub in most underwear drawers. I wouldn't worry too much. Most No Pet rules are based around animals peeing on the carpet. I've lived in an apartment for years breeding corn snakes and leopard geckos, and keeping various pythons with a No Pet policy. My landlord and his wife were total hardasses, but they saw them several times, and the only thing they did was ask what the hell was in all the cages and racks. I casually said, "Oh, I breed geckos as a hobby. They're like fish, only I don't have to worry about spilling any water on the carpets". I took a leopard gecko out to show them and kept a printout of the general info about what I kept just in case they grilled me, but it was never a big deal.