This past Saturday when I stopped at Cap N Cork to get some brewing supplies I also bought a Brew Hauler. This low-cost (~$12 or so) strap system made out of nylon webbing fits around a carboy making it much easier to carry. Instead of having to carefully lift a full (and potentially wet) carboy and hug it while carrying it around the house I can now just lift the nylon straps and carry it.
This worked well on the initial test of carrying a carboy of Chocolate Milk Stout from the laundry room into the bathtub where it’s fermenting, and I suspect it’ll work well after that. While looking up info on the product I did find this report of it not working right for one person, but I suspect that they didn’t have it set up quite right, resulting in the carboy sliding out one side of it. I’ll keep a careful eye on it, but it seems like it’ll be just fine.