I think if you check the lenses mentioned in your initial post, 18-55 is lens, the 55-250 is lens, the ef 100mm f/2 usm, you will find they all use a 58mm filter. The 50mm you mentioned later will also likely be 58mm, especially if a Canon.
Make sure you bring lens hoods if you have them. If you don't have them consider getting one for the 18-55mm which will likely be your most often used lens. Cheap ones can be acquired off eBay.
The Pearl Harbor Memorial is a must. Take a drive to the windward side of the island for wonderful surfing action. A little known excursion in Oahu is a submarine dive where you can see some WWII wreakage. Five years ago we went down to about 105 feet. Unigue experience, everyone has a window. Learn about light...red disappears at about 60 feet down so if you wear red it will turn blue and show up as blue in an available light shot. Use flash, that item will turn red.
Like coffee? Most Starbucks serve 100% Kona until about 11:00 AM. Its an awesome cup of java.
Enjoy your trip...my 1st trip to Oahu was in 1963. Still going back.