Why not? Seems reasonable to me. Probably a good idea to have more than a few on hand if you intend to use for all of those. :-)

And definitely, strength of material has to be the number one issue on most if not all of these. Though, I have seen some cheapo party baloons survive crazy things I wouldn't have thought they could. Might just have to add one or two to the PSK.
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Experience is a hard teacher because she gives the test first, the lesson afterwards.