The school is considered an SMC. The security clearance is for that reason. It is also why we tell posters to keep their noses clean legally since sooner or later prior to commissioning they will go through an even more intense security clearance (TS).
Don't worry if you have a speeding ticket, what they are looking more for his a criminal history that would jeopardize your ability to serve.
I thought that you could do this online, if you can, I would still suggest you try to save it on a flash drive JIC. You'd be amazed how paperwork gets lost.
As far as the travel. I thought for ROTC it was a 1 time deal, not over and over again, i.e. will not pay for T-DAY, winter break, spring break. You would be best to post this on the SMC thread for more clarity regarding this issue.
Review the paperwork carefully since this is the point you should start creating a "checklist file" for ROTC correspondence. They will want the original SS and BC, no copies accepted when you arrive. No originals will delay getting paid. Always amazes me on that fact since all they are going to do is make a copy of it anyway. However, regs are regs.
To this day, DS has one of these files with him at school, and we have kept the originals at home with us. There has yet to be one yr that we have not had to dig into it for one reason or another.
The same is true from the security clearance. As I stated, come your sr. yr when you will go for your TS, it will be easier to refer to this and just add on from there, than pitching it now because you think you will never need it again and having to start from scratch again 4 yrs later.
Bullet in his 21 yrs AD has every record of his TS clearances since he was in AFROTC. Clearances are only valid for 5 yrs., and there are levels of clearances. Any AD person will tell you SAVE IT. This is the baby step one, just like baby steps, you walk before you run. TS is running.