Hey,
We didn't take DD out of the cot until she started trying to climb out at about 20 months, then we put her on a matress on the floor. It was really hard, Up 20+ times the first few nights and even now 6 months later she still gets out of bed about once a night. She too was all over th cot and we have had a few falls out of bed. she is in a toddler bed at the moment but we're thinking a bigger bed might be better so there's more room to move.
So not a gerat success story here...yet...but ever the optimist
Good luck!