Just back from a long cycle tour in Europe. My first attempt at cycle camping too.
Things I learnt and from others i met along the way:
With all the gear it's like cycling with another bike+ on your rack.
I probably should have used strong touring wheels, oops.
Routes on bike paths take longer generally as does crossing towns and cities
Taking your bike on trains needs plenty of thinking about , it's different in each country
Flixbus are shit! they claim to take bikes but cancelled on my mate.
If you're going from A to B you may not spend the whole day on quiet lost lanes and actually might have to ride along with the lorries e.g. Italy.
And finally get rid of stuff, weight matters , you use more energy getting a heavier bike up to speed even on the flat.