If your search these threads you'll find a lot of discussion on this issue - including pics of some installations on boats that have no "proper" propane locker...
Having lived with a pressurized alcohol stove for 12 years for all the "right" reasons, our latest boat has propane and honestly we'd never go back.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)