Your RTW may be daunting but you will not know what your limits are until you discover them for yourself. I have had 3 RTW's. the first 2 did not go well and were to early the third was spotty to begin with but is still on going. I am still on a restricted schedule and due to work accommodations I was but in a very low stress position.

Basically work put me somewhere to keep me at work because they did not know what else to do with me. It was not easy but you may surprise yourself with how tough and resilient you are. It sounds as though WCB is testing the waters and seeing if you can go back to work.