Delorme Streets and Trips is just about the only other option.
Amazon
I preferred the MS Streets interface but you can get used to the new interface fairly quickly.
Some campgrounds are shown on the maps but by no means most of them. I don't like the way parks and such are shown on DeLorme but to be frank it is all that there is now that MS dumped S&T.
I thought that some company named Pilot (maybe) made navigation software aimed at truckers but I haven't found it. Ah wait it's CoPilot not Pilot:
LinkIt is aimed at truckers tho. But there is a free app that works on some tablets:
appIt does not work on the Kindle Fire but I don't know if that has a GPS.
I was finding S&T 2013 to be getting more and more out of date myself.