I have a 3500 lbs high wall pop-up. I use the receiver hitch that came with the factory tow package, no weight distribution hitch or anti-sway control. I have personally never had a problem that would warrant either of there.
The factory mirrors on my F-150 work fine for seeing to the back of the camper, I suspect the mirrors on your Chevy will be more than adequate.
Once you get the camper, there are some things that I would strongly recommend getting. The first are PUGS(www.popupgizmos.com) They are solar bunk end covers that block the direct heat from entering the bunk ends. The second is Reflectix ( Home Depot or Lowes). Cut the reflectix to fit inside the zippered windows of the bunk ends.
These two relatively cheap ideas will #1 keep the camper cooler inside during the hot summer days and warmer during the colder times of the year. We even cut some to go underneath the mattresses, #2 help block out some of the light and sound if you're a late sleeper.
Second thing is to look at replacing the factory tires. Most of them are **** and are marginal at best. We upgraded to Kuhmo Radial 857's that have a 99 mph speed rating (never tested it out) but more importantly it about doubled the weight capacity per tire. The added benefit is that they have stiffer sidewalls which makes the camper more of a joy to tow, especially in cross winds.
Third, invest in a set of camper stabilizers. We use Valterra #020106 Stabilizer and have had good results. We need to get a second one for the kids back bunk and possibly one for the slideout. The almost eliminate all the camper movement when you're walking around inside.
Fourth, since the fridge inside in barely big enough to hold more than a few items, consider investing in a really good ice chest. We have a Pelican which consistently ranks with a Yeti, but is about 1/2 the cost. There are several other brands that are similar such as RTIC, Orca, etc. But be warned, once you get them full of food and ice...they are HEAVY.
Courage is the feeling you have right before you fully understand the situation