I played RTC1 for a short time last night and I have a question: how long does it take guests to become hungry or thirsty? Does it depend on how large a distance they have to walk in your park? I started on Forest Frontiers and I spread out to almost the halfway point on the map. However, I only had three rides and a rollercoaster. Nobody ever became hungry or thirsty. If I put down shops, they wouldn't use them. I got to roughly August and gave up for the night. How do these needs work?

Playing the first level i believe.
Think that they need a little longer to get hungry and thirsty.
I do remember the same thing when i played RCT 1 deluxe from GOG.
Just play the second level when you beat the first and you will see if they get hungry, thirsty in a longer time then 6 months ingame.
You can also click on a guest and see how hungry and thirsty they are.
Otherwise i don't have any info how exactly long it takes for them to get hunger and thirst levels up enough, also i don't use the OpenRCT2 mod since old pc still works fine with these games.