Usually not hard at all but with things to check first?
One is to locate the nearest outlet or wiring that works off the inverter for ease of running wire from there to where you need it.
Second point to check is that the inverter is large enough to power the couch, etc. of anything that will be used at the same time.
If you have 600 Watt inverter, that will be the total limit of all those things you will want to use at the same time. No problem if using a 600 watt inverter to power something like 200 watts and another item like 500 watts IF they are not used at the same time! No good for a 1200 watt coffee pot!
This limit is a factor ONLY when using the inserter power, not when plugged into normal shore power as it just passes through the inverter.
Basic idea is simple enough if you can get from point A to point B with wiring!
Inverter will have AC wiring going in as well as AC wiring coming out to anything currently on the inverter. So to add or extend to the couch, find a point to tie more AC wiring onto what is on the output side. Maybe you currently have an AC outlet that works off the inverter close by? Just tie the new wire onto that outlet and go to a new outlet!
But maybe the inverter is closer, so add the new wires at the outlet of the inverter!
Thinking of it as water hoses, either add a second hose to the existing hose to get further away OR add a second hose where the first attaches to get water to two different points!
I did a check of the wiring for your RV and it looks like you most likely have a 600 watt inverter? That is not too much to go for many items at one time, so look closer before deciicng. It also means it drains the battery quicker if using more things, right?
Not a killer point but something to be awre of before jumping in!
These are the drawings for your unit 110AC wiring:
https://www.winnebago.com/Files/File...ire_158523.pdf
From that drawing I think you will have these outlets on the inverter? Check if I am on the correct sheet as I'm doing a bit of guessing as it "looks" the same.
So if you can locate any spot along this run of wiring like one of the outlets, it is not technially hard to tie on but likely more difficult to get the wire where you want it?
One point I might mention if I were doing it, is that many RV outlets are pretty weak and made to be quick installs, not the best for lasting and if they don't use screws to hold the wires, I favor changing to a more solid standard 15-20 amp outlet from the big box stores as far better lasting. A dollar invested to avoid the weak little spring connection going bad!!
Click this snip to get a better view but for actual location, you may have to do some searching for oults hiding under and behind things. Any of the blue marked items or the wires between will do what you want, just match color to color in most cases.