The path is inlaid brick pavers so it is reasonably stroller friendly - it is easy to find from the MK side - to the left of the bus area, from Contemporary it starts at the traffic lights on the North Side so follow the sidewalk out towards the traffic lights then cross and voila, you are on the path
There is no "nice" way to walk to the Poly - you could but not nice at all - lots of traffic and you have to walk on a sometimes very busy road under the canal between 7 Seas Lagoon and Bay Lake. The monorail is the way to get to TTC/Poly/GF from the CR
We stayed at CR- North Wing and used the path all the time - allowed for a quick jaunt over to MK and actually ended up at MK for at least part of the day every day we stayed at the CR (4 days and we made it to the MK 6 different times) thanks to DS (3 1/2) who loves MK (and Epcot and AK but thumbs down to Studios)
Thanks
jaysue