I've been using Power Pro, which is pretty good braid. I'd think you could get away with 30# for flipping. I also use a fluorocarbon leader, 15 - 20#. I initially had some problems breaking off on the hookset until I learned to ease up. You really don't have to slam the fish on the hookset - a sharp lift of the rod has been plenty for me.

I've been flipping with a 7'6" & 6'6" rod. In really tight quarters, like under overhanging trees, the shorter stick is easier to handle. But, for flipping tules, the longer rod is good. You have more leverage & can flip farther.

As far as the topwater, braid is the only way to go for frogs. I've also been using it for buzzbaits, although some guys, like Scott Green at the Pro Shop, tell me they hate it for buzzbaits. On the other hand, he says Gary Dobyns recommended braid to him for them. So, like a lot with fishing, it probably boils down to personal preference.

Good luck at Spring Lake! I'm going to try to get out there Sunday afternoon/early evening.