I'll bet that's about a 20 minute walk, but I'm just guessing to a certain extent. But I CAN say that when we stayed in cabins, we requested the 2100 or 2200 loop - we got 2100 - because they are most central to the grounds, closest to the pool and trading post, and therefore shortest distance to anywhere you may wish to go...
It depends on how fast you walk! It probably took us about 15 minutes to Campfire. We walked around the whole resort last year at Christmas to look at the lights. That took awhile.