Thanks, @Bill Gulley . I poked around on the forums and I can see why you would advise against land contracts.
Please correct me if I'm wrong, but it sounds like the potential problems with land contracts or CFD's are because there isn't a transfer of title, which makes issues like maintenance and land/building developments in a dangerous gray area. Control of the property in general is complicated. It also seems that the best seller-financing is a deed to the buyer in exchange for a mortgage from the seller.
What I haven't figured out yet is how this works when the seller still has a mortgage with their lender. Do I need to worry about the "due on sale" clause? Can I take over their mortgage payments or do they still have to do those?
For the deal I'm setting up, the seller is happy to do financing to get the deed out of their name and not have to worry about the property anymore. They still have a mortgage for ~$32k. I don't have the capital to simply pay off their mortgage, which is why seller-financing is my go-to option. Low money down and in this particular case I think I can get excellent interest-free terms.