CSR is as spread out as CBR but you can ustilize the bus service to get from the main building to the other sections if you end up in a section you feel is too far.
Theme park buses go:
2 - Casitas
3 - Ranchos
4 - Cabanas
1 - El Centro
Downtown Disney buses, as well as Park Exit buses go:
1 - El Centro
2 - Casitas
3 - Ranchos
4 - Cabanas
CSR buses go in this order so that guests can hop on board a theme park bus and take it to the main building. They can then hop on a DTD bus to get back to their rooms.
cabana 9b is close to bus stop 1 and the main building with a short walk to the Dig Site over the wooden bridge
cabana 8a is close to the Dig Site and bus stop 4 with a short walk to the main building.
cabana 8b and 9a are inbetween the 2 above.
ranchos 7b has a quiet pool, is close to the Dig Site and bus stop 4 with a bit longer walk to the main building. 7b is behind cabana 8a.
The casitas are close to the gym, spa and have great fountains and courtyards. casita 5 is close to the Dig Site with a good walk to the main building. The lower the casita number the closer towards the main building. Casita 4 & 5 are near bus stop 2.