Not a dentist/hygienist, but I had pockets developing in my 20s (but not as deep as yours) and had to do cleanings ever 3 months for about a year until they were under control. At my hygienist's suggestion, I bought a waterpic and now use it 3-4 times a week in addition to flossing. I put a capful of antiseptic/fluoride mouthwash in it and then use it as intended concentrating on light pressure into the between the teeth and below the gumline areas (not too high pressure as you don't want to cause damage!).
I've never had any issues since - excellent checkups, no pockets, minimal plaque (my hygenist said my teeth are some of the cleanest she sees and my gums are in perfect shape). Back to doing every 6 months cleaning and yearly x-rays.
Not sure I'd go a year with the history you have (I don't feel comfortable myself with my history). Your teeth and gums are pretty important and regular checkups are easy and not terribly expensive considering the alternative. Just my 2¢ anyway.