Rsschneck and us have concluded that we truly are neighbors. Our neighborhoods are under .5 miles apart... or in DVC terms... about the distance from BCV to Epcot!
I'm not too sure how often we will be going. We typically go for 2+ weeks during our trips when we are with the kids. Now that the kids are older, Deb and I can travel by ourselves as well. Even though 2 of them are living at home... we do not need to make arrangements anymore when we leave them alone... in fact... we can just call them from our destination and tell them that we are gone.
We spent 2 weeks last summer with the 5 of us. Deb and I went again in September for a week when I was in Orlando on biz. I was there again last week too on biz... but Deb was not able to attend because she was busy at home. I decided to use some of my free time to tour DVC again... and buy our points. I bet she never lets me go there alone again

(Just Kidding).
We pretty much always fly united. I have no idea what the fares are from Portland to MCO... since I typically use FF miles to get us there. I travel a lot for business and have many miles in my account. I should start looking at the fares now though... because FF tickets are not always available.
We will probably usually get a 1BR if just the two of us (or if 1-2 of the kids joins us). When the whole family goes, we will probably get a 2BR... and occasionally a GV if we invite some of our extended family to join us. My preference will be to avoid studios... but they will be OK when that is all that is available for just Deb and I. When I travel on biz, I suspect that we will stay in a hotel because it is hard to put a condo on the expense report. For hotels, we usually use AP specials... or stay at the conference hotel if I am traveling in biz.
At this point, I am not planning to use DVC for trades. We have other condos that trade very well, and are much more economical to trade than DVC. We also use our other condos for an extensive amount of traveling in the PNW, usually during weekends. We like to get to the coast at least 1-2 weekends/month. We also have a small plane that we fly for pleasure... so travel around the PNW is fast and part of the fun.
I am looking forward to meeting some of the folks from the area... I think there will be a get-together planned soon.
/Jim