Missing step in backup (DR) plan
I am hesitant to create a job that takes full backups as I do not want to break the log shipping chain so here is where I need some advise on how to control my log sizes.


This is a misconception/myth. A fullbackup will never break the log backup chain. Only an adhoc NON COPY_ONLY backup will break the log backup chain.

In full recovery, only a full backup will truncate the log.


  ran a log_reuse_wait_desc and there is nothing holding the log


Check your autogrowth settings. Make sure it is not set to Percent autogrowth and the MB autogrowth is sensible.

You can check my script to check.

Also, you should check : Why Does the Transaction Log Keep Growing or Run Out of Space?