10X sounds your hooked on ground hunting. Good for you.
I'll try and give you some help here because I came down out of trees about 4 years ago. First, without knowing the exact set up of your blind, if you have to stand up then I would suggest not letting the deer get too close. If your background is good then I would stand up slowly as soon as I see the deer, providing the deer's eyes are occupied elsewhere. But another option would be to get a stool or small chair to sit on so you don't need to stand. I bought 2 of the same type; one for my home range and one for hunting. That way I'm practicing from the same stool I'm hunting from.
A second option is a ghillie suit. The most portable ground blind. You can buy them ready made, but for archery, building them from a kit is the way to go. I bought an archers model a couple of years ago and still had to spend considerable time with scissors trimming it. This past summer I bought a kit (for less than half the price for the completed suit) and made my own in about 2 hours. I was also able to customize the colors closer to the area where I hunt.
Just like any other endeavor, it's a process of trial and error to find what works best for you. As in life, by making mistakes we learn what to do, but more importantly, what not to do.
Hang in there. It sounds to me that you have a good idea of what you are doing. If you think being close at eye level with them is heart pounding, wait until you see your fletching disappear behind the front leg. The greatest natural rush (even better than jumping out of a perfectly good airplane) I've ever experienced.
And I am sure you will get to experience that soon.
By the way I also have Asbell's book and I would suggest you read it again. Too much good info to absorb, at least for me, in one reading.
Good Luck