Good idea to do everything on paper if you're able to take your time to plan an excursion and see it as a personal challenge.
But the CAA are very strongly encouraging pilots to use GPS, in the hope of keeping the hopelessly incapable navigators among us out of controlled airspace.
Having started my flying some forty five years ago in the old traditional way, (later taught to navigate on paper charts at 350 kts / 250' agl, then somewhat slower but down to ground level on rotary wing), I do still carry paper charts as an absolute backup plan, but all my planning (helicopter) these days is done electronically. Where required, I print out landing site details using a subscription of "Anquet Maps" for my 1:50,000 mapping and prints of aerial photography from "Google Earth". I never otherwise hold a paper chart/map in flight. Instead I use the two "standard fit" (duplicate) GPS units in the aircraft plus a hand held tablet with Sky Demon, duplicated on a mobile phone.
As the RAF used to say: "There's absolutely no need to practice bleeding!" So I don't.