Hi Don and Michele,
Congratulations on both purchases. That's a fine combination you have there. I'm wondering what the numbers are that have you concerned. I'm not sure the GVWR, GCWR, and tow ratings for the Dodge but for the Montana - I'm using 2004 numbers since I don't have the 2005 numbers. They should be the same or very close.
UVW (unloaded vehicle weight) is 9380. That's supposed to be as it leaves the factory, without battery or propane bottles and no gear or liquids.
GVWR (gross vehicle weight rating) is 12,140. That's the max you're supposed to load it to.
For the trip you propose I'd guess it will weigh in approximately 11,500, give or take a few hundred pounds. Pinweight should be 20 to 25% of the total weight, or probably 2300 to 2800 lbs. Most likely, I'd guess, around 2500.
Lots of folks are towing equal or greater weights with the same truck. Maybe some of them will see your post and jump in.
Good luck on your trip. Sounds like a lot of fun. What plans have you made for places to visit so far? Be sure to drop in and let us know of your adventures.
I suspect your Dodge
--edited-- I have no idea what happened to the rest of that sentence.
It was supposed to say -- I suspect your Dodge will do a very nice job with your Montana.