Just completed this task on weekend. Brother and late dad electricians so I always have an ear for my questions.
Used 10-2 armoured cable out to my attached garage so it was protected and stapled on studs. Bought a 120 volt 30 Amp RV receptacle and single pole 30 Amp breaker that matches name on my main service panel. Enclosed end with 4 by 4 box and appropriate cover. Tested today.
Don't do it if least bit unsure. PM if necessary.
Agree that some electricians would wire the 240 thinking garage, welder, table saw etc.
My rig is 50 amp but 30 is fine for the 24 hours it is parked in front of my house and why I chose that route. 100 bucks total...........Canadian eh!!!!!!!!
Good luck.
Electrical is not one to mess with if unsure.