flavored condoms, maybe even a selection of flavors, out of your pocket (wrapped and sealed) and ask the lady to use these the lady since you would prefer a CBJ.  I doubt any ladies would object.

Another option, prior to the date you might want to talk to the lady on the phone and say that you prefer everything with a raincoat and that you will be happy to supply flavored raincoats.  She should "get what you are asking".

When you get into the "acts", simply ask to be covered. Simple as that.

Providers will have the "jackets" already. Bringing your own will not necessarily be a good idea unless you have special requirements. Providers generally have their own which they are comfortable in using.