I used to fly into PHL all the time.
You either get 8/26 or 17/35. I've been put on either depending on the winds, traffic, etc. Of course, I was always flying a piston twin and so my speeds are a bit faster. Expect 8/26.
I never flew in VFR, always IFR, but it really is an easy Bravo to deal with. If you can go IFR I'd just do that, but I've seen people fly 172s in that I believe are probably flying VFR, so it seems to not be an issue.
I wouldn't mess around with flying into Wings or the like. Adding ground transport will be a pain and end up negating any cost savings. The FBO there isn't cheap, but like you said shouldn't be bad in a 170. Call ahead, you might be able to work out a deal. One friend of mine worked a good deal when he had to fly overseas and parked his Aztec there for a few weeks for a reasonable price.