I'll give you a bit of context and understanding. What's happened is that two people are investigating a scientist who was believed to be involved in suspicious practices and they end up discovering that he's a "mad scientist".
Said scientist eventually traps the two and manages to send them back to a time period in the age of the dinosaurs. I want my characters to survive obviously so I want to send them back to the period where they are most likely to survive. So luckily they are sent to this period of time (which I don't know anything about).
Eventually my characters will return back to the modern day because they are able to fix the base (and time machine) that sent them to the past after three months to a year. Nevertheless surviving in the past is going to be tough.
Furthermore I know that the atmospheres, plant life, temperature and animal life was completely different. Still I want my characters to survive. Just want to give them the best chance of survival.
Given this what would be the best age or time period in the Mesozoic Era to send my characters back to?
For context my characters are living in North America so I guess picking a time and place in North America should help narrow it down. I hope this helps.