Hi! I'm so glad you're loving cloth! I've been cloth diapering for most of the last 3.5 years, with my two youngest boys.
If you're using Fuzzi Bunz, you'll be good to go for night. I will use a Fuzzi Bunz during the day with just one insert, but at night I'll put 2-3. It will be bulkier, of course, but will get him through the night totally dry. I am definitely not one to change in the middle of the night! :) So try doubling or tripling your current stuffing and that should be perfect!
You can do a lot of different things for wipes. I buy cloth wipes specifically made for diapering, but some people like even the cheap wash cloths from the big box stores that are made for babies. I prefer thicker wipes generally. My favorite are from http://www.fussybutt.com/ though she uses some really plush fabrics that can be pricey. Another great spot to look for wipes is http://www.diaperware.com/ . She has a chart to help compare the various wipes she offers. I've used a few of those kinds from her and they work great! You can then wet them with plain warm water, or put them in a box or wipe warmer with a wipe solution. I love the wipe solution from http://www.earthybabes.com/ - and they're located in Katy, so I just go out there and pick it up. These days I mostly mix up the Earthy Babes solution in a plastic peri squirt bottle and then wet the wipes as I need it - great for on the go!
Hemp prefolds are definitely going to be bulkier, but they'll be much more absorbent than a single microfiber insert. In fact, when I have used hemp prefolds in the past, I'd use just one of those in a night time diaper, rather than 2-3 microfiber inserts. There's a lot more material AND absorption in the hemp prefold, so it's a great option for nights (when it doesn't really matter if it's a bit bulky!).
Hope this helps!