If you don't 'have' to work but just want something to do, with your child care experience consider volunteering a the local schools. They always need help. Or perhaps the hospital or senior home just visiting with the patients. Do you enjoy reading books to children? Perhaps the library would let you come in to read to the preschoolers.
Of course, if hubby takes your vehicle for work you'll have to be creative in getting to places. Perhaps a RV park close to town and riding your bike!
Also, perhaps the RV park that you stay in would have a need for some temporary help. If it's a busy one and in the summer when there would be kids - organize some craft projects. Before you move from place to place, do some possible projects and take good photos of them and send them in advance to the parks you'll stay so they can see your work. Getting paid for a couple weeks probably would be difficult so you might have to negotiate just doing these project on your time but charging a small fee for materials by each person doing them. . . and not only kiddie projects...maybe adult crafts, too. Good luck!
Full-Timed for 16 Years
.... Back in S&B Again
Traveled 8 yr in a 40' 2004 Newmar Dutch Star Motorhome
& 8 yr in a 33' Travel Supreme 5th Wheel