Hi! I had a level 21 survivor with skills similar to yours but at a lower level, and managed to complete after ringing the gong at Level 21. So it can be done.
However, lower level characters will have a harder time, especially if you don't adopt some kind of cheesy tactics. Also, unfortunately, I share the view of many that the Wasteland is weak compared to the rest of the game--almost pure hack and slash (or sneak and slash in my case). If you are enjoying the game I wouldn't be in a hurry to move on, unless you are planning to replay and would like to have some new stuff remaining for your next game.
Good Luck whatever you do.
