Glycogen storage in the muscles has no impact whatsoever on blood volume level. The two are completely compartmentalised separate entities.
I have super-soft hydrated skin and a tendency for low blood pressure.
I find that caffeine, a low histamine diet, and salt work well for me with regards to correcting low blood pressure.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.