Hi Chris!
I can't directly answer your questions, but I will add what I have learned about my own blood pressure fluctuations, by showing how much my blood pressure fluctuates, throughout an average 24 hour day.
First of all, blood pressure usually is lower during the early hours of the day and gradually increases throughout the day, and then goes lower (dips) late at night. I had out-of-control, unhealthy, dangerous blood pressure in the 1990's. I started taking my blood pressure, in 1998, an average of seven times per day until I was finally able to get my blood pressure down to healthy levels all the time, 24 hours per day.
I'll share some of my blood pressure records. I am posting two charts, showing how much my blood pressure fluctuates during the day. It fluctuates quite a bit! Blood pressure medication, of course, effects the hourly blood pressure, but the overall pattern and movement of the blood pressure would be very similar with or without the medication, IMHO.
The first chart, showing my "average" blood pressure for the entire year of 2009 (age 65), shows my healthy Diastolic BP range. The scale starts at the Diastolic level of 61, and the hours listed begin at 1am and run 24 hours until midnight.
The numbers represent hours of the day from 01 thru hour 24, or 1am thru 12am.
To read the following chart, the * represents the BP Diastolic reading. The average Diastolic reading at 1am was 71. At 2am the reading was 73. At 7pm (hour 19) the Diastolic was 77.
The lowest hour's average, 63, was at 7am. The highest hour's average, 83, was at 5pm (hour 17).
I just wanted to show how even healthy BP fluctuated during the day, and it's easier to see the pattern thru a chart, no matter how primitive.
Hr ________70________80________90
01 __________*
02 ____________*
03 _______*
04 __________*
05 __________*
06 _________*
07 __*
08 ____*
09 ________*
10 ________*
11 __________*
12 ____________*
13 ____________*
14 _________________*
15 ________________*
16 ___________________*
17 ______________________*
18 _______________*
19 ________________*
20 _____________*
21 ____________*
22 ____________*
23 _________________*
24 _______________*
The next chart was created from my unhealthy blood pressure averages for the entire year of 1998 (age 54), which was the first year that I started taking my blood pressure at home. I was shocked that my blood pressure was that high, with unhealthy levels throughout the day and night. I didn't know what to do. It took years of frustration, anxiety and worsening health before I was finally able to get my blood pressure down to healthy levels. My Cardiologist just kept saying that, with Heart Failure, it was normal to have higher blood pressure, and that it was OK to have the type of high blood pressure levels that I was having.
To read the following chart, the * represents the BP Diastolic reading. My average Diastolic reading during 1998, at 1am, was 104, at 6am 98, at 11am 88, at 4pm (hour 16) 99, at 10pm (hour 22) 103.
Hr ________70________80________90_______100 _______110
01 ________________________________________ ___*
02 ________________________________*
03 _________________________*
04 _______________________________*
05 ____________________________________*
06 _____________________________________*
07 ________________________________________ *
08 ________________________________________ _*
09 _______________________________________*
10 ________________________________*
11 ___________________________*
12 ______________________________*
13 ________________________________*
14 __________________________________*
15 ____________________________________*
16 ______________________________________*
17 _____________________________________*
18 _____________________________________*
19 ____________________________________*
20 ______________________________________*
21 ________________________________________ *
22 ________________________________________ __*
23 ________________________________________ *
24 ________________________________________ ___*
In my case, I found out that I suffered from Insulin Resistance, a pre-Diabetes Type 2 condition, in which the blood pressure went up late at night (non-dipper) instead of going down.
What I did, was to find an Insulin Resistant diet on the Internet, and then start one. The effect on lowering my blood pressure was dramatic!
My thread, at the time (2005):
Does an "Insulin Resistance" diet improve blood pressure? at the link:
http://www.healthboards.com/boards/high-low-blood-pressure/242229-does-insulin-resistance-diet-improve-blood-pressure.html 
But I love my much improved health and quality of life despite heart failure, AFib and Insulin Resistance. 
