[Zeke]

When you say "shower surround" you mean over a tub? MRDW would probably be OK, not my first choice. Anyway, if you do go this route, leave the sheets up off the tub lip around 3/8ths ". Fill with the best caulk you can find using a couple of coats and dragging it level. Set the tile and leave another gap of about 3/16ths min. Some people fill the tub with water before grouting this gap. I don't grout the bottom edge of the first row. I use caulk and the kind that won't mildew. What you don't want is water intrusion along that gap and then getting the bottom of the DW wet.

One more tip: When you paper the wall before the sheets (you should), leave it long and trim later.