I periodically join a group that organizes seasonal sailing and camping on an Island that's about 30 some-odd miles off the Southern California coast, (i.e., Catalina Island.)
Some of the old "salts" point out that keeping stuff dry and on the tramp is only half the issue; especially in an unexpected capsize. In that case, the extra weight, tied to the tramp or carried inside the hull(s) can make self-righting the boat very difficult or impossible.
These experienced off-shore beach cat sailors give some sound advice:
1. Understand that the extra weight will likely rest between your mast head and the supporting hull when you are capsized. This, of course, puts lots more weight, just where you don't want it when trying to right the boat. The stuff, it's placement when capsized and its weight may even be sufficient to cause the boat to turtle.
2. Load the boat with all the stuff you intend to carry and configured as you intend to configure, place and secure it. Then capsize the boat where you can get help or help yourself, then see if you can right the boat....BEFORE you venture far from help.... "fore-warned is fore-armed."
3. If you can't right the boat, with all the stuff loaded as you intend.... (or even if you can) ensure each piece of gear, stowed in its water proof container floats....or put it with some gear that does float in its container (dry bag, cooler, etc.) Then tie a lanyard to each container containing gear. Each lanyard is about ten feet long and has one end tied to a gear container and the other end of the lanyard is secured to the boat.
The lanyards are stowed under or tied to the container they each service.
The purpose of the lanyards are so you can jettison the gear if you can't right the boat, and still have the gear floating and attached to the boat.
Once the boat is back on its feet, one simply pulls the lanyards to retrieve the gear and the gear is again tied back onto the tramp.
This is some pretty good advice, born out the experience of others.
Just some thoughts....
Tom H.