xcrunner,
First.... Not to alarm you, but please take note of the advice here and do NOT hesitate on getting applications in immediately. You are late to the party, but there is still time if you hurry.
That being said, there are certainly colleges that offer financial aid and scholarships that compliment an ROTC scholarship. Just two examples are Norwich University and TAMU.
Norwich University offers a fair amount of merit money. In addition, in keeping with their role as the birthplace of ROTC, they offer anyone who brings a ROTC scholarship free room and board through an add-on local scholarship (automatic as long as grades/conduct is maintained).
TAMU has a wide variety of scholarships available (more than most), including several dedicated to just ROTC cadets. Most of these scholarships "stack" with ROTC money and can be used for remaining expenses if I recall correctly.
So... what you are asking about is certainly possible. But this needs to be your full-time "job" for the next several weeks or more. And you need to get started right away.
Good luck!