I planted a few seeds this evening. In Garden #1 I planted a square each of spinach and carrots next to the garlic.
In Garden #2 I planted lettuce, celery, sugar snaps, watermelon, Old German tomato and bell pepper. I was careful to not plant the tomato and pepper too close to where I had the tomatoes last year. The watermelon seeds are left over from the watermelon that grew last year.
I forgot to update on the rain barrel. It works quite well for me. The gutter system captures less than a quarter of my roof area but even an inch of rain fills the barrel. I think I have space to add an additional barrel if I could find one on the cheap.