There is a lot of good information here and it was even mentioned that you should have a disconnect which is very smart. Most circuit breakers are not listed as "switchable", a simple disconnect is preferable. There are RV specific panels with disconnects or switchable CBs, they are a little more but worth the money in my opinion.
It is not good practice to connect or disconnect while the outlet is hot. A hot disconnect can damage your outlet contacts and/or the shore cord plug blades.
One other thing while not a biggie, is nice to have and that is a weather tight box that can be closed when the plug is in place. It does not mean most big box stores don't carry such boxes, but I have never seen one in a big box store.
I have a bit of experience in the electrical field and I didn't think nor did I really plan ahead when I installed my outlet and I forgot about the cover closing and the disconnect. I have lots of stuff laying around and did install a 20 amp outlet in the same box as my 30 amp outlet, very, very handy to have. I do prefer 20 amp 120 vac outlets for exterior use and inside the garage. While few of my power tools use more than 15 amps, all my outlets outside and cords run cool.
Remember that Google is your friend and now that you know what, you can find where.