I used to keep stuff in the hull, unattached and like you I never knew where it would end up. Then one outing I found out, when my spectra line snapped after the emergency paddle I had stored in the hull slide up against the line in heavy seas and left me unable to turn right. After my beach landing, more like crashing.....I decided to attach the emergency items to the lip edge of the hatch, much the same way Hobie attaches the extra rudder pin in the rear hatch. A few small holes, SS hasps and my bilge pump, emergency tools, safety kit, telescoping paddles are attached to clips and bungees no longer able to smash into important internal lines and I know which hatch to look for which items.
I too bought the buckets and have since stopped using them entirely. The lids just don't go back on the way I like when rocking and rolling.
I like PFD with pockets for the stuff I use all the time.
I don't use the tramps very often, the haka does seem like a better alternative, if they have some cushions
I have a TI and the paddles supplied by Hobie are not as useful as a long handle, large square blade paddle.

I used this to crash/steer into the beach, to help land the boat to the ramp, as a push pole and to act as a long arm to reach strapping under the trailer at the end of the day. I wish Hobie would provide this kind of paddle instead.
I just got the Hobie Seat cushion to add to the seat. This gets me out of the water a bit more, not entirely.
I love this darn boat, best fun.