They do that all the time and there can be several trees and floating logs to bask on and still they will all try and jam in on the same one. When the log gets full they will just start stacking up on top of each other but I have never sen them go any higher than 3 high because once a fourth tries to climb up the turtle tower crashes into the water
Good to go slower anyway as taking time to make sure you have absolutely everything needed such as a fence and that it is built right makes for a better turtle experience in the long run. I can't even begin to tell how many times I have had to go to peoples houses to track down an escaped turtle because they did not build their fence right. Not only do they climb very well but also are very good at digging tunnels which is actually the most common escape method. An average sized semi-aquatic turtle can dig down about 1 to 1.5 feet deep or even deeper in soft or saturated ground. If you do decide to build a fence be sure and let me know before you do and I will send you one of the habitat guide books I made for msatr.com . The guide is free and includes general info about the enclosures both ponds and indoor terrariums plus several plans that are grouped into several budget amounts so that anyone can get the most out of what they can afford. Also depending on your location I may be able to help you get the turtle(s) either from the rescue or from someone closer to you that I can recommend.They are soo cute!!! ahh I still don't have fence for them yet
