Congrats on the new rig. Have had our 3791RD for about 18 months now and really enjoy it. It has been everything we hoped it would be!
I don't want to spoil your learning experience but I've posted a couple of reviews/lessons learned items on the forum if you're interested.
http://www.montanaowners.com/forums/...ad.php?t=65267
We only had 1 battery at delivery..upgraded the batteries:
http://www.montanaowners.com/forums/...ad.php?t=68486