For your situation, I would recommend one of the native toads (Anaxyrus)- whatever is native, legal, and common in your area would probably be fine. Toads of this genus tend to be hardy, and are very forgiving of slight husbandry errors on the part of the beginning keeper. And while I really wouldn't characterize any amphibians as being handleable on a frequent basis, toads are less delicate than most, due to their thick dry skin. They can usually withstand a wide variation in humidity and temperature, and will eat nearly any live, moving prey that will fit in their mouth. On top of that, they seem to have a lot of personality, as compared to many other batrachians.
I would also like to address what others are saying about not being able to leave your herps alone for a few days- I have found otherwise. Being able to leave them for a few days is actually one of the advantages of keeping herps over many other pets. As long as they are healthy and well fed, and housed correctly, most herps, and certainly frogs and toads, will be just fine being left alone for a few days. I travel quite a bit for business, and routinely leave my herps, and have never had a problem occur as a result- and I have quite a few more than two animals. During longer trips, I usually ask somebody to check on my animals, and those are the only times I have had problems leaving them- when the person checking on them has screwed something up.