Connie,
I park at the basement carpark at RWS. There is a cap charges of $2x a day, so if you plan to be there full day, it's okay. When you enter Sentosa, use the lane for RWS, so that you won't be charge the island entrance fee of $6 or $7. If you use other lanes, you will be charge the island entrance fee, but the parking fee is cheaper at the other side, not sure if there is a cap for that. End up about the same bah.
Ling,
You can drop her off then spend your ME time around the centre, rather than driving home and come back again.
Blendedbaby,
My gal has MMR. No fever after that. I am guessing that if you gal are more prone to fever after jab, she would very likely to develop a fever after MMR/MMRV. You can plan for the jab on Friday, so if she does develop fever, it'll the next Friday, so just skip class one day and then it's weekend already. If you seriously need some rest, I think it's okay to let her start next week.