This is what I know take to federation tourneys and when I'm a co-angler in my local club.
6 Combo's. If I'm fishing with a buddy in my club that I know has more room, I may take one or two more if a 2 day tournament.
One tackle bag with 5 Plano 360 boxes in it. It's a smaller bag with several end pockets (zippered), etc. I have 2 bottles of scent, terminal tackle, pliers, etc. and some misc. stuff in addition.
One small worm bag (BPS 'medium' size - not the BIG one). I keep worms, tubes, trailers, hooks, etc. in it, along with spinnerbaits and buzzbaits.
I also have one backpack (not a big one, but a good one). It has rainsuit, food, water, safety equipment, gps, batteries, goggles, eyeglass stuff, etc. in it. I EXPECT that the boater will have ONE comparment for me to stow my backpack in. Not too much to ask. If he doesn't, the backpack goes in my seat when fishing, otherwise, on the floor under my legs when riding.
And I always take my own lifejacket. I can carry everything myself, if needed. Lifejacket on then backpack; tackle box over the shoulder/in left hand along with worm bag, and rod's (I use the BPS rod wraps to bind them together) in my right hand.
When fishing the Federation, I do not know who my boater will be until all the boats are launched, generally. Therefore, I don't get the advantage of stowing everything neatly in the parking lot.
Tex