We upgraded from a pop-up to a 2013 X23B. Love it. Have been to Alaska, California, Wyoming, Maine, Texas and all points in between. Here are a few suggestions. Not sure how much info you need so this may be overboard. If so just take what you can use and toss the rest.
Always Chock the wheels both sides before you unhook from the tow vehicle. If this thing starts to roll you will never get it stopped. I make it a habit to do this even when on level ground just so it becomes a habit.
We only open one of the propane tanks at a time. That way when one runs out you know you have a full one left. Some people leave both on so it will switch over when the first one runs out. I don't like that system because when you are out, you are out and may be a long way from getting resupplied.
Start the refrigerator the day before you leave on a trip. It takes a long time to cool down but it holds temp well after that. You will be amazed at how little propane it uses. Once we leave the house we leave that switch on automatic. if you are on campground electric it senses that and uses their electricity, when on the road or boon-docking it automatically switches to propane
One of the only complaints about the X23B is the inside shower. Not designed very well. We usually always use the campground shower. When boon-docking we will use the outside shower
Where the bunks close and the two rubber gaskets meet I occasionally dust baby powder on the gaskets. A couple of times the front one has stuck pretty tight. The baby powder prevents this
Sewer is not a really big deal. There are several videos you can look up on You tube. Here is one of many
Black tank gauge will probably always read full. Just one of those things. Our grey tank almost always fills up the quickest so we just dump the black whenever the grey is full. Dump black first then grey
When we are at campground and on their electric we always run a small portable 1500 watt electric space heater instead of the furnace in the camper. Turn on the camper furnace first thing in the morning to take the chill off and then the space heater maintains it after that.
Took us a while to figure out how to get the best reception on the TV. There is a booster button you can push when using the antenna. If that button is on when you are on cable it screws the picture up. We got all the to California from Kentucky on our first trip before we got that figured out.
When cooking on the stove it does make a difference when you open the vent on the outside of the trailer. It is located right behind the stove but it has to be opened from the outside.
Make a checklist of things to watch for when leaving. Antenna down, steps in, stabilizers up, vent cover closed, windows closed etc.
When driving in the rain the awning tends to gather water. Needs to be opened and dried out or mildew will start to develop.
Hope you enjoy yours as much as we have ours. Safe travels