No grantee you'd get selected? ...Hmm okay  

if I was in your Place  I won't let go of that
 FULL Scholarship and I'll surely 
Save my seat in that Uni (Wyoming Uni in your case).
if god forbid you 
didn't get accepted in NUS ,wouldn't you feel quite depressed other than the fact that 
you'll regret NOT joining Wyoming Uni.
Keep your dreams HIGH but don't let go of a Golden Opportunity 

Good Luck =D