I usually have four to six rods on my small two man Twin Troller. I fished tourneys for a few years as a co-angler and I learned to make do with several rods pulling double duty.
All my bait casters are Abu Garcia low profile and round reels.
2 6'6" medium heavy action rods. These are my jig, worm, Carolina rig, medium to deep cranks and 1/2 oz lipless cranks rods
1 6'6" medium action rod. This is my shallow crank bait and light lipless (1/4 oz) cranking rod.
1 6'0" medium action rod. This is my top water popper, light rapala x- rap, etc rod.
1 6"0" medium spinning rod. This is my finesse rod and for all those lures too light to throw with a bait caster. I rarely pick it up though.
Tackle, well that's a different story. I have a medium "Alice" pack U.S. Army ruck sack that is stuffed with just about anything I might need on the water. Funny enough what ends up within reach most often is my jig box and shallow crank box and a pack of my craw trailers. I don't even want to talk about what it weighs. About the only thing you won't find any or many of in my tackle "bag" are spinner baits and buzz baits. I pretty much never throw either for a few reasons.
I suck with them. In 23 years of fishing for bass specifically, I can count the number of bass I have caught on either a spinner or a buzz bait on one hand. (this is mostly my fault for failing to learn the ins and outs of these baits and actually using them.) Come spring here in East-Central Illinois everybody and their brother has a spinner bait tied on in chartreuse or white or some combination of those colors and they are chucking and winding it all day. And well into summer and fall. I learned many years ago, during a club tourney in Georgia, the value of doing something different behind the guy on the front deck. This lesson is also easily applied to the 3-5 boats going down the same bank/area in front of me chucking and winding the aforementioned spinner or buzz baits. (I take great pleasure in following behind them with my jig, or a worm and sometimes a shallow crank and catching all those fish they didn't.)
If I had more room I'd probably carry a few more rods as I like having spares.