First off....we are so glad you and your wife are attending the Lake Siskiyou Rally. I have read many of your post and response to other post, so it will be nice to meet you in person.
Now about site 335......
We had that site year last.
Please be advised that we are SOB's owners. We tow a 30 ft. TT.
When backing into site 335 my husband did need to be guided by another MOC'er (Thank You Don of Searchers).
It did take a little work, but we made it. A 5th wheel would be much easier as your turn radias is shorter/sharper.
Only one suggestion about the site....from a womens point of view
You may want to get your trailer as far to the right (looking from the front) as you can. This will allow the awning to come out. There is a tree there that made it difficult for us to use our awning. Although the awning is not needed for shade....I only wanted to use it last year because it rained a little and I wanted to keep the chairs dry
Site 335 does offer a large area to the side to expand out with the chairs and a fire pit
Site 335 is fine....just bring chain saw incase LOL!
And don't worry the rest of us will have our chairs out and we will encourage you in the backing up.......
Seriouly.....You will have a great time. One of the best Mini Rallys to go to....in fact have you ever seen a Mini Rally having to be closed.....well this one is so good that they had to close new attendees...LOL!