This is interesting Will as I have not encouraged tillering by doing that, having found it happens naturally on many beans that are sown in autumn and winter. You make a good point about wind damage as the new stems come out at an angle and are often slighly "floating" above the soil, where they leave the main root. So some string around the bed is worthwhile.
The great thing is that if you have lost some beans to winter weather, you may still have a decent harvest after the surviving bean plants have made new stems and filled out the gaps between plants.
And yes, the soil should finally start to dry out after a relentless run of wet weather. Three weeks mostly dry looks possible. My new greenhouse is up, at a cost to the soil unfortunately as they assembled it in saturated conditions, see This Month later today….