Unless you have connections, like your dad is an alumnus, you can't count on getting into one particular grad school these days, can you? Apply to several, get in one, become a teacher whom students seek out--it's a terrific life! I didn't teach for a lot of years, but I still hear from and enjoy visits from former students ... And they've gone on to do some amazing things.
Always have options, plans B, C, D. It's really tempting fate (or as my 10-yr old friend says, "Asking for it") when you place all your chips on a single roll of the die.
roadie