If I were to be in 2000 loop, I would ask to be put near the entrance to the loop which means a campsite with a low number like 2001 or a high number like 2069 (IIRC there are almost 70 sites in the loop). Being near that entrance means it's a short walk over to the bus stop in front of the 2200 cabin loop rather than using the 2000 bus stop. I recall visiting amcc (first time I met her) and she was near the end with the high numbers.
The 2200 loop along with the other cabins is served by the Orange or Yellow (don't remember which) but they both swing over and go by the Trading Post pool area, one on the front side and one on the back side. Don't remember which is which but using the 2200 bus stop will put you on just one bus ride to that area.
If you are about halfway around loop 2000, then yes, use the shortcut to the right of the back of the Creekside Meadow/group campsite Comfort Station and you will see the bridge that will take you out into 900 loop. It's not bad walking or biking at all.
Bama Ed