I am a 3/4 RVer. We took out 2 of the chairs in our rv and gave me a corner. I have a sewing machine (Bernina 830 with embroidery) on a table made for the machine and two 3 drawer stands to hold my thread. I have a tub of fabric I store in the belly of the RV so that I can pick and choose. When we travel the ironing board comes down the desk goes there. Machine on the floor under the table. I love it and would tell anyone to do it.
Also, if you have not upgraded your RV yet. Look at the rv's that have a room in the back for hualing bikes, trikes etc. You can always make that your sewing room instead of the "other" stuff.