Back in Time and Back in Time Equipped are two ways to reach the King Bulblin 1 Fight, one of the ways to set EBF. A full description can be found here.
Normally pressing A or B while on the title screen with control of Link will crash Wii versions; as either A or B is required to pull up the title screen logo and A+B is required to advance to the save files screen, this poses an issue for performing BiTE on Wii versions.
By exiting the game entirely (return to Wii Menu) and reentering the game, then advancing through the title screen and menus to reenter the file quickly afterward, this crash is far less likely to occur (though it's still possible). Note that for this precaution to work you must get BiT first try, else you will have seen the title screen more than once which is what doing this precaution avoids.
As a note, if a route for Wii is ever created where there is no savewarping prior to when one would perform Back in Time Equipped, this precaution could be taken prior to the actual run and would not be done "on the clock".
After performing Infinite Bomb Arrows, perform Back in Time. When you resume on the Bridge of Eldin, jump off to restore normal HUD, then savewarp. As with a normal BiT Save, you will respawn at the Faron Spring, but you will have a full bomb bag (30 bombs, 15 water bombs, 10 bomblings), the bow, and a full quiver (30 arrows).
It's also possible to bring back only Bombs by storing a null item in place of the Bow. After beating Lakebed and Midna's Desperate Hour, warp to Zora's Domain and descend to Upper Zora's River. Talk to Iza and Fight the Messengers as Wolf. After completing the fight, Iza's dialogue will be glitched, but she will still bring Link inside her hut.
This stores the bow and gives Link a lent bomb bag. Warping to Upper Zora's River will repeat the glitched dialogue and she will again bring Link inside her hut. This second time, the bow gets stored and also the real bow is replaced with a null item, and the lent bag becomes emptied. Warping UZR again repeats the process a third time; the null item gets stored and the lent bag is filled with 30 bombs and stored as well.
A video of part of this process can be seen below.