Haven’t been on here for a while so hello 
My husband and I have experimented with anal play, vibrators etc…but our anniversary is coming up and was thinking about buying a full strap on to wear to peg him.
Any advice on good ones and how to manage it so I don’t injure my back! 
You are certainly at the right place to discuss pegging .
There are 2 basic types of harness - traditional or pants type
Traditional are more common and uses various straps to hold the dildo and fits around your body . Huge selection here and I recommend to buy a more expensive to avoid chafing
Pants are more comfortable to wear while holding the dildo firmly - I recommend the strap-on-me brand (available via lovehoney) but can only accommodate up to 1.5 inch diameter
If you are looking to use standard size dildos you should not hurt your back .. if you are looking for dildos in excess of 12 inch - these need a harness with back support…
We have used both the pantie and the traditional strap-on harnesses,
the pros and cons of pantie style,
They are quick and easy to put on and they hold it quite securely for smaller toys.
The cons,
they are difficult to change toys midway through.
If you go up a pants size or down you have to get a whole new one.
Traditional,
They look more dominant, which I like, and they can hold any toy with a simple change of an O-ring.
If your weight fluctuates a little bit, it’s no big deal. You just readjust it.
The cons are just, it takes a little longer to put on.
Helloooooo. And welcome… go on and treat yourselves
Mrs W here …
If you are both happy to do it, then get on and do it @CuriousCat40 … Mr W and I started and can’t stop … when I walk in wearing the strap-on, Mr W becomes putty … we start with a close, slow dance and Mr W soon drops to his knees and performs oral on it before we move on… just make sure you are well lubed when first doing it and take the penetration gently ntil he is happy to go harder and deeper … gives me such a feeling of power. We have developed our own routines and now do it both doggy fashion and Missionary depending how each of us feels. Just wish we had started years earlier … its fantastic love xx
Welcome back to the forum.
Me and my partner absolutely love the doc Johnson pegging set below. We’ve had this strap on for years, we’ve tried other brands but none of them compare to the comfort and versatility of this one. You can use vac u lock dildos and normal flared bases dildos with this set. We’ve used some mega dildos and it does support them pretty well too.
I hope you find what you’re looking for and find the right one for you.