First of all: awesome
Second of all: Sure Seals (do a board search, discussed MANY times)
Third of all: My WOCN suggested drawing a nice hot bath and relaxing for 20-30 minutes to get an idea of how your appliance deals with being submerged. See if it affects your wear time. Confirm to yourself that you can submerge your appliance without it leaking. You'll probably be pleasantly surprised.
In terms of covering the pouch, I wear a high waisted bikini like this: www.urbanoutfitters.com/urban/catalog/productdetail.jsp?id=26680397&cm_mmc=SEM-_-Google-_-PLA-_-26680660&device=c&network=g&matchtype=
They're actually quite "in" this year so we're lucky
I know ASOS and TopShop have them too, I think those are more accessible in the UK...