Just because you are not going anywhere this year for spring break, does not mean you won't want to in the future.
I suggest doing the odd/even year split if your STBX is involved with your DD more than the typical OEW. If in your year or his a vacation is not planned, you can always negotiate time outside the parenting plan and split the week or work out arrangements like 7yrs. But as your DD ages, you may consider a trip/vacation and your STBX may not be accommodating (because family is coming to town or he made plans, etc). The parenting plan resolves these types of conflicts.
~Feel your emotions, but control your behavior~ Unknown