Another option is a little off the wall but so very useful- go to a park with a covered picnic shelter. Push 2 tables together & have at it! I just bought two 12 foot 1x4" pine boards to do an over-sized queen & the park is my choice. Nice tables, good scenery & outdoors. My kind of day. The boards were sanded & dusted & store nicely in the garage. I have a mini van so transporting the boards is no problem. Also using the Schamber method, you can use rag ties to hold the rolled top, batting & backing together if for some reason you don't get it all basted. Once layered this way- things are really portable.
Good luck
sewverybusy1