Dependable Childcare During Winter Needed

I'm a single mom to a 6yo girl and 8yo boy, who is looking for dependable weekend childcare during the winter so I can work my seasonal job. The actual hours needed are 645am-545 p.m. on Saturday and Sunday starting mid December thru mid April. The start and end date of the job varies, based on snow conditions for when my job opens. I work FT so, aside from the weekends, if school is closed due to a holiday, I could use additional childcare. Also after school care could be helpful 2-3 days/week for 1 kiddo. Meal preparation, engaging activities/play, patience, and reliable transportation for all winter conditions are needed. The main thing that it entails is getting fingerprinted and CPR certified, which they pay for.