I took the Ducktour when I was a few weeks preggy because I was ignorrant and didn't realise the restrictions. During and after the ride, I kept on telling my baby... stay with me, stay with me, please be alright. It's only a ducktour... pls pls pls... pray pray pray. I only stopped worrying after the next gynae visit and he did an ultrasound.
I would've traded looking after the bags anytime! I am sure there are other things to do besides rides. In fact, it's also good time to be the volunteer photographer and sharpen your skilss in time for the new arrival.
All the best.