Thinking of carrying a full size E rated spare on our up-coming Alaska , Dempster trip from Ontario , rather than just the factory spare. I will be removing the back seat of our Chevy crew cab and thinking I should just carry it there. Probably wouldn't fit underneath anyway. Anyone carry theirs in the back seat? Or any other thoughts? On our Nfld/ Labrador trip I never had anything but the factory spare , but thinking it might not hurt this time. Thanks.