Hi Monica!
We don't worry at all about keeping the genre for storytime and DITHOR lined up. We had it line up a couple times in Bigger, too, but I actually found that I liked it better when they were different. It seemed to make the story elements and character qualities stick better if we were hitting them at different times of the year rather than all in one month. And, when you start Preparing you won't be using DITHOR daily any more (and the storytime won't be genre-based). Anyway, don't worry about lining them up. It will still work marvelously!
We don't do any advance prep for the guides. We just grab things as we go during our school day. (Like, for a science activity in Beyond...I'll grab the guide from that child as I'm ready to head upstairs for my time with her. She will have already grabbed the needed stack of books as that's her 1st job of the morning while I'm with her brother. I'll give the boxes a quick glance and notice that we need a flashlight and a ball, so I'll tell her to grab the flashlight from the "junk drawer" and a ball from her brother's room and meet me upstairs. And, away we go!) Carrie usually has several options for activities or projects, so we just use what's easiest for us. I think I can count on one hand the times that I've had to skip something because I didn't have the needed supplies. There was once in LHTH that we needed powdered laundry soap (and I use liquid)...so we put that off until we went to town the next day, and then the occasional time that I was REALLY in need of a Wal-Mart run and was out of all the options for the day.

When you get to the older guides and the kids are doing more of the projects independently, the guide tells them to come and mention to you a needed supply coming up the next week if it's something specific that will be needed. Like, a bag of colored candies (m&m's, skittles) for science in CTC...
If it makes you feel more organized, give the guide a glance on Sunday night before you start the week so you know what's coming. I have enjoyed that in the past. But, that has not been my reality for the last couple years

, and I can tell you that the open-and-go method is working very well for us here! (With 3 guides and 2 babies

) In the future, I can see myself enjoying a leisurely Sunday night glance at our plans for the week.
You're in for a great year! I just started Bigger for my 2nd time this spring, and I am enjoying it just as much this time around.

Grant loves to remember his year in Bigger when he's asking Allison about her day at lunch time.

I think we'll be picking up somewhere around Unit 7 when we start again in August...I haven't pulled the guide out to remind myself yet.

Kathleen