Yes, I agree with LV and littleman.
We are an example, we cover all costs associated with access, and mother relocated to Thunder bay, more than 18 hrs straight driving from us, with but 10 days prior notice, court would not hear our claims on the same (that's a whole other ball of wax), but we were expected by the custodial mother to cover all costs associated with access and refused to even "offer" to cover anything in regard to access, as she put it, "It's a matter of priority, and I would expect Mr. X to put his child before his own personal needs". "If he doesn’t want to see his daughter that's his choice, but who gets hurt here? Not him”. Guilt trip?? you bet!!
A birthday present here and there, and a few streamers is really nothing and really should not be an issue. The cost should be covered by whom ever is giving the birthday party, and the other parent simply provides the regular gift(s) for the child. I'd rather that then the $800+ we now incur in fuel, accommodations and food to exercise visitation.
Do NOT turn this into a matter of wits. This is too trivial to split hairs over.
There are far worse things to worry about. Advise the other parent, if I give the party I will cover the supplies, and equally if you give a party. If we do it together, (if that is an option) then the costs could be split 50-50.