I'm a big believer in therapy even if you have the best relationship in the world. Olympic athletes, some of the healthiest people in the world, see more doctors than anyone else. Even healthy marriages can use a periodic checkup. In fact, typically it's the people that aren't willing to go to therapy that need it the most. There's no shame in therapy; it's helped us a ton. I have some close family members who started seeing a counselor, and their lives improved dramatically. My wife and I decided "we're happy, and we don't feel like our marriage is suffering, but if it's helped others, it can probably help us too. Let's go anyway just to see if we can learn something." We learned a lot, and it was a great thing for our marriage. Now, when we realize it's been a while, we go back to get a tune-up, before things get bad. As a society, we don't have to convince people of the value of exercise and seeing a physician regularly; but we struggle to give the same message for emotional health. Think of it as an oil change every 3000-5000k rather than waiting for the engine to sieze.
I'm not implying that your marriage is broken; I think everyone could benefit from a GOOD counselor. There are some really crappy counselors out there, but a good one is worth their weight in gold.
I don't blame your wife for not wanting to be in a sxs or motorized rig after those experiences. That's gotta be tough for you though, I feel for ya.
When my wife and I got married we didn't have a ton of hobbies we enjoyed together. Two things really helped us:
1) a weekly date night
2) planning something exciting every month so we had something to look forward to together.
Now we enjoy doing just about everything together: hiking, backpacking, car camping, eating out, traveling, mountain biking, kayaking, SUPing, eating lunch in a park, making videos together, community service, you name it. Don't be afraid to try doing something she loves, even if it's girly, like yoga, or dancing, going to a museum, or something like that. Our marriage isn't perfect, and we keep finding ways to improve, but we've been very happy for the past 11 years.