If you need a 8wt rod to cast a bass bug you might just consider getting a 7ft broom handle instead. 
A 6wt will work in most conditions, even turning over a #1/0 Dahlburg diver. Just remember that bass typically aren't leader shy, so go with a 7.5ft 1x tapered leader or just tie 2.5 ft of 10lb mono below 5ft of 15 lb mono.
A 6wt will work in most conditions, even turning over a #1/0 Dahlburg diver. Just remember that bass typically aren't leader shy, so go with a 7.5ft 1x tapered leader or just tie 2.5 ft of 10lb mono below 5ft of 15 lb mono.