This is tough because RagDolls have been bred to be particularly laid back and probably do not have the same survival instincts of a typical moggie.

I always recommend doing a risk assessment if you are going to let a cat out but unfortunately RagDoll personality makes it high risk letting them out.

Firstly, any chance of cat proofing your garden? That would be the ideal solution. If not, any chance of making a run?

You may be able to buy meshing to fix on downstairs windows so that they can be opened but not let a cat out. Not sure about doors - either way you would have to train everybody in the household to be very careful of doors.

I let my cats (not RagDolls) out, but only during daylight and I findit really difficult sometimes to prevent escapes when it is dark. One cat is really really quick at getting through a narrow gap. I have to shut her in another room if I need to go out.