Preschool Help

So as it turns out, the preschool the girls went to was no longer functioning when I went to get L signed up. So I scrambled looking around, all local ones I could find were filled, or way too much for a miss frugal like me. I even found out about a joy school group in the ward, but they said they were already established and didn't want a new kid (yeah that's the type of ward I live in unfortunately). The gist of it is. I am doing Preschool for L myself this year. I have an idea of what I would like to do based on some great information C's Kindergarten teacher gave me last year. I am planning on doing it three days a week, with one of the days focused on playdate/fieldtrip time, so he is still getting some social networking.
My question is please please please if you know a great website with preschool ideas, a great idea of your own for activities, or a great field trip opportunity in the area that isn't too highly priced, I would love to hear about it (even and especially seasonal things such as: Pumpkin patches around Halloween, or Christmas Festivals (daytime activities). I decided if I paid myself each month for supplies just as if I was paying for a normal priced preschool (or a little less since I don't have to pay me, just for supplies). I hope it works out. I want him to have fun and be prepared for Kindergarten, as well as have some fun friend and mommy time.
Thanks!