Not sure about type of sites. But not sure you can put an RV and tent on the same site. Most campgrounds we have been would require 2 sites if have rv and tent.
The sites are more based on price which is a location type of thing. There are different sizes in each category.
When reservations are made the person reserving will be asked for the number of slide outs and size of awning so that the site will fit the equipment.
When getting to the site, if it looks too small, it’s acceptable to drive back to reservations to get another site assignment. Usually this is more of a difficulty in actually backing into a site since the turning radius is based on the towing vehicle.
It is possible to have a trailer and a tent at each site. The tent is meant to go on the sandy area, not the paved pad.
We’ve found the FW sites to be ample but we’re not in a huge mobile home with 17 slides (slight exaggeration).
As long as your equipment is within your site boundaries your second tent will probably be ok.
We have asked to be near the comfort stations and have tried to arrive about 2 pm. We’ve only stayed twice at FW but gotten our requests both times. More than the numerous times at resorts.