Hafa adai! My home wiki is English Wikipedia, where I am an admin. I am also an admin on Commons and have accounts on Meta and Wikisource, among others. My Chamorro is pretty awful, but I have a number of people whom I ask to doublecheck when I feel ambitious enough to edit here. I am using the Chamorro-English Dictionary' by Topping, Ogo and Dungca published by the University of Hawaii Press to check spelling. There are obvious issues in that written Chamorro has never been entirely standardized, but the Topping et al work appears to be the most recent and widely used, so that might as well be the standard here.
Hopefully I'll manage to rewrite this introduction into Chamorro at some point. ;)