Let's Go Back in Time!
Climate and Environment
Travelers would find lots of swamps and forests, there would be small mountains that look like hills, and not many insects flying around like we see today.
Comfort and Safety
They should pack boots for the swamps, long pants for going out in the forest, clothes to keep you cool, because it is so hot, and have some bug repellent.
Some of the amphibians wouldn’t be used to having people around so you should watch out. If you are swimming in the ocean watch out for sharks, they are still evolving.