okeydokeygirl, I had a cap once and hated it. Uncomfortable and unpleasant with the spermicide I had to use with it, and those foaming pessaries things, ugh ugh ugh.
Mooncup is wonderful! Got used to it quickly and it has saved me a mint
If in a public loo, I empty it, wipe it out with toilet tissue and reinsert. You can carry one of those mini bottles with water in it (from Boots, with the travel pot things for decanting stuff so you don't carry the full size item on your hols.) I don't find I need to though. I like to carry small packs of wet wipes with me but they aren't strictly necessary. Practice at home first.
You only need one.
Go for it - looks like Frannyandzooey could sort you out quickly (atta girl, F+Z! Let's convert the rest, hey?)