Play safe, Stay safe.
Avoid genital to genital contact
Don't touch your genitals and then touch her/vice versa.
When you shower after your massage, use anti bacterial soap, some spas supply alcohol ie: SRM. Just to be on the safe side, but I'm anal about hygiene. Can never be too clean. If your still not feeling comfortable, bring protection, no MPA would object.
If the above cautions are taken, you should be safe to say that your safe.
Added note: High end licensed spas ie: SRM, Allure, are required, as part of their license to get a medical check, which eases the mind as well. I think the girls in this industry are relatively cleaner because they have to be. They have just as much to lose as we do.
In regards to LE activity, as far as I know Brampton/Mississauga have the most leaniant Bi-Laws. I feel safer venturing out to that end of the city. Visiting a MP that is licensed reduces the risks of LE by quite abit.
Happy hobbying.