Such fun kitties you have
My cat doesn't rummage through garbage bins because she's like, "Eww...leftover human food. Yuck!
". I feel like I'm a level beneath her all the time
Here's what you can do:-
1) Get the bins with covers that can be locked shut. You know the ones where you can twist and it locks into a slot? Keep the outer parts of the bin and cover as clean as possible. That means no leftover gravy flowing down the sides or scraps stuck to the cover..etc. Use a tissue or paper towel to wipe it. If possible, empty your trash at night/daily so your kitties have nothing to rummage.
2) You can't stop them from climbing because they are masters of heights. Keep leftover food in the microwave oven, if you have one. It's definitely safe in there and there will be no food smell to attract the kitties. Or make sure your containers are really secure to avoid spills in case the kitties swat them off the top of the fridge.
3) Get some kind of lock for your bathroom door, such as a hook to hold the door shut properly.
4) Make a water fountain for your kitties with tips from the DIY thread. All you need is a plastic container and an aquarium water pump. I saw some pictures of people doing that. Your cats should love it too and will avoid them from drinking water from the bathroom.
Good luck