For excursions this summer like river tubing, bamboo rafting, waterfalls, I'm looking for (family of 4, all in adult shoe sizes) water shoes that are also comfortable without blistering after walking a good bit, maybe on uneven terrain (but not serious hiking). I'm leaning toward JBU/Jambu, because they look like they fit the bill. But I have no idea how comfortable they are after a few hours, like whether the toe area will eventually rub blisters on the tops of toes. Appreciate any suggestions from personal experience with this brand or others, or ones to avoid.