Those states west of the Mississippi would have a hard time contributing to the mobile Confederate Army trying to defeat invading Union forces. Add to the problems you mentioned and it almost becomes impossible for those states to help.
It didn't matter too much anyway if the laws of those states allowed for their conscripts to be transferred to the front. The Confederate conscript bureau was a complete failure. Most of the states were against it and were a obstruction to its success; plus the Confederates didn't have the man power to supervise it properly. I posted over on the Mississippi board that the reports for most of 1864 showed only about 500 men were conscripted and sent to the front and of those 300 failed to make it to their units.