Ways to prevent "swimmer's ear" from coming back?!

Ways to prevent "swimmer's ear" from coming back?

I went to the doctor when the pain got really bad, and he told me to keep using the ear drops that I have, which were prescription, not over-the-counter drops, but I also have an over-the-counter type. The over-the-counter ones say they are homeopathic, soothes and calms, are safe for use with antibiotics, and the active ingredients are: Chamomile, Mercurius solubilis, and Sulphur. I read somewhere that I can prevent swimmer's ear later by using over-the-counter ear drops before and after I swim, is this true? If I use these ones I have right now, will it help me not to get another infection?
I can swim less, which I won't enjoy but I can handle since it'll help keep the infection away, but I'm going whitewater rafting the first week in July, and there is no way I'm going to miss it. I'm gonna get some swimmer's ear plugs (not the kind designed to keep sound out, but the kind used to keep water out ..... any suggestions?)and I need to know if using the homeopathic ear drops will help?

I have suffered with swimmer's ear all of my life, I can help you. If you don't have abnormally shaped ears, this will work for you. Have your ears cleaned regularly to remove excess wax. Then before and after you swim place a few drops of a 50%-50% mix of alcohol, and white vinegar in each ear. It is a home made version of swimear you can buy that works just as well. Ear plugs will help a bit, but they are a pain more than a help, I found out. If you have abnormally shaped ears(on the inside, the canal, and such) like I do, you will need to be more dilligent on keeping yours ears clean. I have been told not to use Q-tips, it just pushes the wax and build up further into my ears making it more difficult to clean, and more suseptible to infection, and swimmer's ear.

Good luck.

Stevo.