Thanks for the responses I have received. There will be no problem relaxing for me. I am an experienced traveler to Third World countries and usually take several cameras with me. Recent destinations have included Nicaragua, the Philippines, Vietnam, Laos, Myanmar, Thailand, Ecuador and Cuba (twice). I do speak a little Spanish. I can get around, find lodging, food and transportation, but do a better job of embarassing myself when I speak.
Bill's advice about learning the equipment is valid. I am proficient using a spot meter and I have limited experience using my 4X5 so I guess I'll learn on the fly. As a backup I had planned on taking my Rollei. Point well taken. I'll also search for the book as recommended by Michael.