Question: Let's say you're diving in some foreign place, and will be wearing a pair of (probably) ill-fitting rental fins, the full-footed kind. How do you prevent blisters and chafing on your feet after 3 or 4 days of diving?
Background: I'm visiting a friend in Malawi in a month or so, and am expending my entire checked luggage allowance bringing "American" stuff that he and his family can't get locally. But while I'm in Africa, I'll be stopping off in Zanzibar for some diving of opportunity. Unfortunately, I'll just have my carry on with essential dive gear (mask, computer, camera, etc.). Big things like fins just don't make the weight allowance.
I've seen "dive slippers," basically 3mm booties that promise to help, but I haven't talked to any divers who've done the full-foot fin thing with any success.
Thoughts from the experts here?
Thanks in advance,