Not sure what is your question. My neighbor's daughter went last

Yes, competition is very tough. RSI is harder to get into than MIT itself and Harvard or Stanford.
Typically you have 1-2 people from each state get in.

Having previous camp or some awards will help, but is not enough to get in, unless the awards are really *major* ones, or the student has a very unique story (i.e., from disadvabtaged families...) to tell.

My neighbor's daughter won a lot of awards previously and went to whitle house multiple times to meet with the president.
She got admission to all of HYPSM. Went to Harvard this Fall.