Yes, you definitely have the right to vote as long as you meet the national qualifications such as age, etc. You also have the right to represented by a lawyer in court.
The open arrangement given that threats would desist which Santa Anna would pull back his powers underneath the Rio Grande and not take up arms once more against Texas.
The government was connected because you were not allowed to assemble back in that time, so the government could storm in any time they deemed suitable to them if they had proper suspicion.