Teresa, We haven't traveled with a seven month old while staying at the CBR but we did travel with a toddler who required a stroller, diaper bag, snacks, etc. They had no issues getting around the resort, traveling on the buses, etc. The ride to Hollywood Studios took 11 minutes from the time we sat down on the bus, made the resort loop and pulled into the park. Epcot was just 10. Magic Kingdom and Animal Kingdom took longer but they weren't super long. We have found that most guests are kind and will give up their seats for parents with small children.
As far as getting around the resort, I don't think that it would be a big deal, especially if you have a carrier or a stroller. Even with the bridge closure, the walk around the resort promenade is not terribly bad. The whole promenade is not much over a mile and it loops around the entire resort. Bus stops are in every village and are easy to get to. Old Port Royale is approximately in the middle of the promenade.
Having said all of that, I'm sure that the GF would be more convenient as far as going to the Magic Kingdom and Epcot but you are still going to have to take a bus to Hollywood Studios and Animal Kingdom and contend with the buses. Whiel I'd love to stay at the GF, I would rather spend the extra money on souvenirs or several nice meals.