Depending on the density of of the suede I would agree with M-ayumii and recommend hand stitching. I added some plastic buckles with black webbing to a pair of snow boots using Gutterman (nothing special just my favorite brand) thread, a pair of needle nose pliers (to push the needle through without puncturing your thumb), and a very dense sewing needle. These needles come in multi-packs almost anywhere you can find sewing needles. they will have upholstery needles, leather working needles, canvas, a few other narly looking ones too. Jo-anns has a "Dritz needle repair kit" with the very same needle I used to penetrate .5" of vinyl/insulated fabric and the webbing (like the straps on a backpack), The kit is $2.49 online and usually the same in stores. I got one at Longs once, it's like Rite-aid but in California.
When I attached my belt/buckle to the boot I only stitched in part of the belt not all the way around, you may have already figured. It would not be necessary to stitch all the way around because the tension of wearing the boots would keep the rest in place.
I apologize if my formatting is lame, I am new to chat boards.