There is a fledgling fatrike forum that may interest you. With fatrikes just now beginning to blossom in 2015, there are not very many fatrike owners and riders yet, but this is changing due to the immense fun factor associated with these mega trikes. If you own a fatrike, please join this new forum and start sharing what you know so far. If you are contemplating acquiring a fatrike, join the forum and ask questions. If you own a fatquad (4 wheels instead of 3), you are still welcome to participate and share your ride, as there is a special section just for quads and other trikes. If you own a trike with mountain bike tires rather than fat tires, we want your valuable input also. Help us grow this fatrike forum and make it a fun little place for backcountry adventurers to hang out and share their thoughts!
Chime in here: http://fatrike.freeforums.org/