We went to several wildlife reserves and national parks in Tanzania. It was not very strenuous. We were driven around in vehicles by very knowledgable professional guides--mostly we were just sitting in the vehicles bumping over rutted roads, taking photos and staring at the amazing wildlife. We stayed in lodges and camps--fancy tents with bathrooms in them, just like hotel rooms. The food was good, mostly fairly bland Western food, but once or twice they served local-style dishes that were more interesting. We had boxed picnic lunches to eat in the vehicles. I brought cotton trousers and long-sleeved t-shirts in greens and neutrals, good binoculars, converters for my phone charger, sunblock, insect repellant, hat--just the basics. I wore my plain wedding band (which I never take off) and little huggies to keep my earlobe holes from closing up, no other jewelry. One woman in our group didn't get the no-jewelry memo and wore a CZ tennis bracelet and a bunch of other stuff; nobody seemed to notice, and it didn't scare off the animals. (She told me she was really into bling and said if I ever wanted to buy a diamond, she would help me. But she also told me she could tell the difference between lab and natural diamonds at a glance because lab diamonds are "too sparkly," so I'm not planning to take her advice.)