Thanks everyone for the helpful responses. DW talked at length and decided a FW is the direction we will go. Mainly due to cost and I need a new truck anyway. Just doesn't make sense right now to have a $120k MH that could potentially sit idle for weeks at a time and have to buy a truck simultaneously. I really like MH's and frankly having everything at your disposal while driving is a major plus, but it doesn't eclipse the financial aspect and usability on a daily basis. So in this case a FW is the more practical solution - if practical can ever be applied to RV's :)
So the search will start for a truck and FW. We have time, looking to finalize things by fall or winter. Our trip starts next June and I know I will need several months to work out bugs and set things in order.
I am sure I will have a TON of questions during our shopping, but one that comes to mind right now - I had thought we needed a diesel truck, but someone mentioned the newer gas trucks will work as well. If this is the case I can save a lot of money - not only on the truck but maintenance as well. Thoughts?