I have a 2014 Jayco Greyhawk and experienced a recent electrical issue. I am appealing to anyone that can help because I'm not ready to pay $145.00 hr labor to tell me something that is simple to fix....
You need to tell us what the 2 fuses you changed were for, besides the levels and camera. It's unlikely that an external backup camera took in water to the point of blowing a fuse. Possible but not likely the cause- I'd focus my energy elsewhere.
Also try a mobile rv mechanic. I use and post reviews at http://www.rvservicereviews.com/