Pacific Northwest Apple Rootstocks?

[andyb]

I have a few one year old seed-grown apple seedlings and am trying to figure out what rootstock to graft them onto. I'm renting, so I'll be giving the trees away to friends and family in the area, including my mother- and father-in-law. I really don't want to be responsible for one of them getting a broken hip from falling off a ladder while trying to pick apples, so I'm looking for a pretty strongly dwarfing rootstock, maybe in the short M-9 class. I'm also new to growing apples, so I also don't know much of anything about what disease resistances are most important for growing in the Seattle (Pacific Northwest USA) area.

Does anyone have any suggestions?

[billw]

I've had the best luck with G.41 here in very wet winter soil.