The park and ride plan sounds like a good way to start off. You might want to use the longer route and just consider it a long fun ride on the way in.
As for your cleanup, a sponge bath works quite well. Get a big washcloth and a big towel and you can use all the water you need. Did that for years at various offices. Baby wipes or Wet wipes also help.
Funniest thing that ever happened to me was standing in the restroom stark naked and washing off when a co-worker brought a client by to use the facilities. Learned to lock the door after that... Just a word to the wise.
Good luck too ya.