Hey Lee, first off, I'm really sorry for your loss. I'm glad you're thinking about hitting the road again. That takes guts.
Yeah, solo travel's a whole new beast. It's gonna feel weird at first, no doubt. You might have some days where you're down in the dumps, missing your wife like crazy. Don't worry too much about fitting in with groups. Travelers are generally a friendly bunch. Whatever you decide, take it at your own pace. Wishing you all the best, Lee.