Being an outdoorsy type you'll probably have a window cracked so unless you have a propex to add heat ,( 2 stroke genny and fan heater is cheaper
) then a good sleeping bag, mattress and a cosy pillow will do more than van insulation. Stretch carpet on ply lining will keep your a*se off any cold steel but have a look at condensation issues before stuffing voids with fleece.
http://www.vwt4forum.co.uk/showthrea...ght=insulation Pete (bare van man)
"Nearly all men can stand adversity, but if you want to test a man's character, give him power". Abraham Lincoln ...53 horse power should do it