I have camped at NorthBend in a tent. Good for biking as there are rail trails there. I can't remember how well the cg would be for trailers, it is small as well as I remember. Keep us posted, we are thinking of going this summer as well, would love feedback. We did the same as you, tented for years, had a pup last year and bought a trailer this year 23'!
The backing thing gets easier...
...just be patient with each other!
We have been going to Shawnee in Ohio and we really like it. It is an easy tow if you are nervous about towing and easy to get in and out of; however it is only elec. with portable water, but bathhouses etc. are pretty clean and they have a lot of act. for kids (nature center, p.golf, movies etc.) Beach Fork is a little hilly and the road is tight getting out there--that is my hometown! I work with a lady who has gone to Salt Fork in Oh and they like it pretty well. Hope to get to see for myself sometime. Hope this helps and Welcome!