I'm worried that even with the current size, guests struggle to make their way to the back parts of the park. This was a problem with RCT3 and they added in Stamp Stations to get peeps to travel further back to where you want them to go so they can collect stamps. Kind of an odd solution but it worked ok.
I'm now having the same problem with this park,
http://i.imgur.com/3W9881T.jpg
There are about 4 other rides in the back near the red coaster(mix of family/thrill) and only maybe a dozen peeps make their way back there at a given time and 99% of them are just wondering, not directly going to any ride.
Most guests hang around the front of the park riding the same rides over and over again, back and forth. They always have a route to go to when they're up front but in the back it's just always "wondering" even though there are a lot of rides around them. ODD!
This will probably improve when they add in park maps and transportation(YAY actual working transport! *heavybreathing) but I'm hoping it won't be a problem like it was in previous RCT games with ghost towns in the back parts and right now that's what's happening again. I want to see guests (at least with a map) want to go to any ride anywhere in the park rather than what's near them.