Gilla,
I do all my quilts with spray basting. I have some that have been sitting here for 2 - 3 years that were spray basted but not quilted yet and they are still good. I sometimes will press the quilt before I stitch it when it's been around a while, partly to get the fold lines/wrinkles out and to re-stick the stickiness. It is not messy if you remember to place papers or sheets around before you spray. Not all basting sprays are equal. I only use 505 after trying 4 different kinds. All my quilts are basted on tables. DH is a pastor and the church is almost across the street, we go over there when we know it's not being used and push 2 or 3 long tables together depending on size of quilt. I always have help, either he, or a friend, to do mine. On tables, I tape my backing down, smooth the batting over the backing, fold back half, spray the backing, smooth down then fold back other half, spray and smooth. Then lay the top over the batting, smooth it all out, lift back half, spray batting, smooth, lift other half, spray and smooth. I don't have wall space to work on. I used to do this on the floor but the knees don't allow me to do that anymore!!