RE: Portable Tree Stands...
The best stands on the market in my opinion are the ol'man vision and grand vision series. They're all I use, they're very quiet and very comfortable. They account for about 90% of the stands you see around here.
That being said, I'd be very suprised if the permanent stand you put up was the cause of the lack of deer activity around your stand, especially if you put it up several months in advance. Hunting a stand for a week in a row will tend to drive them away, but only for a few days. Building a stand one afternoon two months before the season isn't going to affect them at all. Myself and some friends have rode 4-wheelers all over a 40 acre piece of land all day and the next day there were deer tracks everywhere on top of our 4-wheeler tracks. Deer aren't bothered as much by stuff like that as we think they are.