I've no idea of your geography but Cycle.Travel has a "suggest a route" feature. Put in your start point, specify a distance and it will offer up to three, round-trip options. Not happy? Hit the button again for three more.
Obviously a bit of checking is advisable but its routes are generally quiet and interesting, although it tends to skirt towns.
You could start at home or at a train destination.
It'll show Archie's registered campsites too if you ask it nicely
(I know you're not a tech head but you can use it to provide inspiration and then plot it out on your own maps etc.)
Alternatively, pick a place or places you want to visit then make a route between them all!
Or just go hippy and set off with no route, a good book and follow whatever road looks good until you find a place to camp, presuming stealth camping is an option. With no destination there's no pressure, you've all the time in the world to stop, appreciate, chat or read.
Have fun and don't forget the Travelogue subforum!
P.S. Tepee tents are great, although I found pitching to be tricky the first few times. They really appreciate a flat surface.
I'm curious though as to how big it is to accommodate the bike and why you want to put the bike inside? On mine I could have put half the bike under cover (flat) but getting in and out would have been very tricky.