Im looking to upgrade my accessories box in which I keep all my bases, extensions, fins and a myriad of bits and pieces. I seemed to have a lot of stuff! I like keeping it all together as there is less chance of forgetting something in a rush to get to the beach.
I'm using a tough plastic recycling tub at the moment which I have fitted with some bunggy chords that can hold screw drivers, extensions etc around the sides. It woks but still gets a little messy and not really big enough of the long fins and extensions.
So I'm looking at a bigger tub, but if you have some neat solution or a better idea please let me know. I've used a gear bag in the past but they don't last long before the zippers corrode!
I have a 30L (?) cheapo Red Dot plastic box which fits a little toolbox about 25cm x 10cm x 10cm with tendons, bolts and screws, fin bolts, spare RDM adaptor, etc.
The rest of the box holds a Gath, extension, 2 UJ's and screwdrivers / pliers, about 2 or 3 spare downhauls, spare harness lines, sunscreen.
All my fins are in a NP fin bag (like a book with zipper around the edge) as it zips up flat so can stand on edge next to said box.
So whole thing is about 60cm x 35cm x 35cm and ready to go
I try to have only essentials or else it gets filled up with every spare I have, so last year I started a bits box at home so I didn't have 3 spare bases in the box at the beach, but no rope or tendon etc.
Two 55 litre plastic containers with lids. Cost under $10 each.
One for wetsuits, helmet, towels, hats, block-out, boots, etc.
One for fins (in a fin bag) + spares including wet'n'dry sandpaper, screwdrivers, screws + bolts for fins, gaffer tape, Selleys Aqua Epoxy Fix stuff, electrical tape (to put around sore knee joints), stainless steel washers, spare rope for uphauls, downhauls, inhauls, outhauls, a multi-tool that does about 20 different things, piece of 50x75mm wood about 20cm long for persuading things that won't come apart, two downhaul tools, 1 spare uni joint and base.
I think that might be about it. 
I have three plastic storage boxes / baskets I keep in the car.
The first basket has all my clothing - wetsuit, booties, harness, flotation vest, gloves rashie etc. After a session everything goes in there, gets taken inside to be rinsed and goes back in as soon as it is dry.
The second basket I take when I rig and unrig. It has the essentials - 2 extensions, UJ, 2 scewdrivers, most commonly used fins, easy downhaul gadget, gaffer tape, waterproof sheet to sit on when rigging, fin bolts and spare screws, vent plug etc.
The third box has things I might need but not often - less commonly used fins, spare ropes, out of season wetsuit, spare towel.
Superceded gear for spares is left at home.
big plastic box from the Asian $2 junk shop.
Its about "so" wide by "yay" deep and long enough to not quite fit my longest extension.
I call it my "bucket-o-things"
An old milk crate, cost nothing, just need to shake the sand out every now and then
No wind, got bored and made up my prototype bits box.
the idea was to create compartments (hard to see but they're in there) to keeps things in place. in my old box no matter what I was looking for it allways seemed to be at the bottom of the box 
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The new bigger box leaves room for most of my fins so no risk of forgetting the one I need.
Scary what I found in the old box, inlcuding no less 6 JP screw drivers
If anyone needs fanatic and mistral (no screw driver) fin bolts, I have some, free to good home.
I like the bungee cord around the sides for holding stuff - top idea. I will be getting a bit of that going for sure.
i just chuck everything in the boot, sail and boom inside the car proper, and board on the roof. used ot use the plastic containers but the boot space is tight so the boot became my new plastic container.
i'm thinking there's more steel in my mast base than my car so rust shouldn't be an issue.
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