backspacing and tire size???????

2001 Chevy Silverado 4/6 Mcgaughys kit...wanting to run 22 and tuck...most likely bags in the future.  What size tires and what backspacing should i go with?  Is anyone running 24's with 4/6 drop? if so what backspacing and tire size? any help would be appreciated

22x9.5 +30 or more24x10 +40 or more265/35/22275/25/24will work with a 4/6 or bags