The show obviously said who got the most votes, but it barely ever actually said who voted for who. This is who I think voted for each other in each episode:

Episode 1: Geoff: Courtney, Tyler: Courtney, Katie: Ezekial, Bridgette: Ezekial, DJ: Duncan, Harold: Courtney, Sadie: Ezekial, Eva: Ezekial, Duncan: Courtney, Courtney: Ezekial, Ezekial: Eva

Episode 2: Duncan: Harold, Bridgette: Eva, Courtney: Eva, Katie: Eva, Sadie: Eva, Tyler: Eva, DJ: Eva, Geoff: Eva, Harold: Eva, Eva: DJ

Episode 3: Owen: Noah, Gwen: Noah, Cody: Noah, Trent: Lindsay, Heather: Noah, Beth: Noah, Justin: Lindsay, LeShawna: Noah, Izzy: Noah, Lindsay: Noah, Noah: Izzy

Episode 4: Trent: Heather, Gwen: Heather, Cody: Heather, Izzy: Justin, Beth: Justin, Owen: Justin, Lindsay: Justin, LeShawna: Heather, Heather: Justin, Justin: Owen

Episode 5: Courtney: Katie, Duncan: Sadie, Bridgette: Katie, DJ: Sadie, Harold: Katie, Geoff: Katie, Tyler: Sadie, Sadie: Tyler, Katie: Tyler

Episode 6: Duncan: Tyler, DJ: Tyler, Harold: Courtney, Geoff: Tyler, Sadie: Tyler, Bridgette: Tyler, Courtney: Tyler, Tyler: Bridgette

Episode 7: Beth: Izzy, Trent: Lindsay, Gwen: Heather, Cody: Lindsay, Owen: Lindsay, Heather: Izzy, LeShawna: Izzy, Lindsay: Izzy, Izzy: LeShawna

That's as far as I got.

I'd say it goes like this:

Round 1

Ezekiel- Bridgette, Courtney, DJ, Duncan, Eva, Geoff, Katie, Sadie
Courtney- Ezekiel, Harold, Tyler

Round 2
Eva- Bridgette, Courtney, DJ, Duncan, Geoff, Harold, Katie, Sadie, Tyler
Harold- Eva

Round 3
Noah- Beth, Cody, Gwen, Heather, Justin, Izzy, Leshawna, Lindsay, Owen, Trent
Lindsay- Noah

Round 4
Justin- Beth, Izzy, Heather, Lindsay, Owen
Heather- Cody, Gwen, Justin, Leshawna, Trent

Not sure who else would boot just over Heather, though.

Round 5
Katie- Bridgette, Courtney, DJ, Duncan, Geoff, Harold, Tyler
Harold- Katie, Sadie

Gotta pick someone. Katie and Sadie wouldn't vote against each other.

Round 6
Tyler- Bridgette, Courtney, Duncan, Geoff, Sadie
Courtney- DJ, Tyler

Round 7
Izzy- Beth, Cody, Heather, Lindsay, Leshawna, Owen, Trent
Lindsay- Gwen, Izzy

Round 8
Cody- Gwen, Heather, Lindsay, Leshawna, Owen, Trent
Heather- Beth, Cody

Round 9
Beth- Heather, Lindsay, Owen, Trent
Heather- Beth, Gwen, Leshawna

Round 10
Sadie- Bridgette, Courtney, DJ, Duncan, Geoff, Harold
DJ - Sadie

Round 11 (real votes)
Harold- Bridgette, Courtney, DJ, Duncan, Geoff
Courtney- Harold

Round 12
Harold- Bridgette, DJ, Duncan, Geoff
Duncan- Harold

Round 13 - No votes

Round 14 - Votes were revealed in the show, no need to repeat

Round 15
Trent- Bridgette, DJ, Duncan, Geoff, Heather, Izzy, Lindsay, Leshawna, Owen
Duncan- Gwen, Trent

Round 16
Bridgette-Duncan, DJ, Izzy, Owen
Duncan- Bridgette, Gwen, Leshawna
Owen- Heather, Lindsay
Gwen- Geoff

Geoff didn't vote for Bridgette, but he wouldn't sabotage the guy's alliance, and Izzy made no indication of following Heather's vote or the girl's alliance.

Round 17 - No votes

Round 18 - No votes

Round 19
Izzy- Duncan, Geoff, Heather
Heather- Gwen, Leshawna
Gwen- Izzy, Owen

Round 20
Geoff- Duncan, Heather, Leshawna, Owen
Heather- Geoff, Gwen

Round 21 - Votes already revealed, won't repeat

Round 22
Mr. Coconut- Duncan, Gwen, Heather
Heather- Mr. Coconut, Owen

Round 23 - No votes, Chef decided

Round 24 - No votes

Round 25 - Technically no votes, but the other campers chose who they sided with in the episode, so I won't repeat.

EDIT: Did all the episodes.