I had my abdominal hysterectomy 9 yrs ago at age 33 and I can say that I have no problems whatsoever with the tightness/looseness of the vaginal muscles..
And the only problem I have faced is I tend to dry out earlier then I used to but like Cherie said KY does the trick..
My goodness this is a tuff one but I will answer as honestly as I can lets address the tight verses loose issues first. I am not aware of anyone who had a change in vaginal muscle tone or size due to a hysterectomy so basically if your tight now you should remain so.
Many women ( I did not ) many dont, many do experience alot of difficulty
to become lubricated, easy answer KY jell, as for ability to maintain orgasim you will still be able to you may find it different though perhaps less intense.(or maybe not this varies soooo much)
advice let spouse know all of this take it slow and easy and maybe have a nice glass
ONE of red wine to relax, If your on any meds NIX the wine idea,
also dont give up keep trying.