I just read your post again, to answer a few more of your questions. I personally like to fish early morning, late afternoon, for years people have been saying that.
Where I fish in a lake, the fish go deeper as the sun rises higher but you still certainly get the occasional bass during the day, especially a heavily structured area like your creek.
As for line, if your using light spin gear, just throw some Fireline on it. 6lb is a good size, if you want to get into the snags a bit then 10 lb might be more suitable. I usually fish 10lb braid on Samsonvale bass as some of them have a bit of grunt. I hooked one last weekend that hurt my wrist as it hit, went straight to the bottom and lodged itself amongst the heavy weeds. Couldn't move it. My mate was amazed at how hard it hit.We'd pulled in six bass already but this one was a bit different. I was using fairly heavy gear for bass 4-7kg 6ft 4"baitcaster that bent right over. It was his first time bass fishing and after he saw that it really pumped him up for more of the same.....is it Saturday morning yet ???