Hi
@Soph01,
Far be it appropriate for a male to give advice (and I am not an agony aunt from a newspaper column), and with the disclosure that I have never worn a dress of any description, I have heard of one bride cleverly situating her insulin pump in an ostentatious hat, another by, um, augmenting bust size to cover and equalise the pump 'bulk', another used an opulent sash or belt. Making a sleigh to carry one's pump in a bridal train will be too testing for the pump and its connection to you and is best avoided as a strategy. But your pump attached to your upper arm, with a device similar to a mobile phone carrier under puffed sleeves is a possibility. Attaching the pump to your wedding garter could be disastrous and best avoided. Use of a second garter for attaching a pump is possible, so long as you remember which garter is going to be thrown !!
If the pump is easily detachable, that can be advantageous later. Certain activity, usually nocturnal, is rated energy- and glucose-burning-wise as the equivalent of running 100 metres.
But adrenaline and caffeine raise BSL (in most people), and alcohol prevents one's liver form releasing glucose to combat a hypo, and glucagon injection may not work on that scenario.
Remembering to pack spare reservoir/needle inserts, insulin (long and short-acting), pens, (Glucagon injection )?, battery etc, glucose jelly beans makes for a better after-wedding experience.
Ensure that your husband-to-be, and then husband, is top notch on recognising and managing your hypos, if need be.
Humour is the best medicine for any condition and event. Smile often and well !!!!~
Congratulations !!!