Am going to be taking a trip to a tropical clime where I will be luggage limited. I have already decided to bring a navy 2b fresco suit (I am told I will need a suit from time to time) and a while and blue dress shirt. I am having trouble deciding if I should bring a pair of khakis or a pair of wool trousers and in what color. Finally, I have room for a single pair of shoes and was leaning toward a pair of black Grenson slip ons, but those will be trouble with the khakis. Any thoughts?