I am going to be driving cross country with my 04 SR5 and I want to take a bike along for local transportation, trails, etc. I didn't want to put it on a hitch mounted bike rack because I will need to access the tail gate often and it seems like it would be in the way a lot. So I got a Thule roof bike rack... but now my concern is the height restriction... I don't plan on visiting many parking decks on my trip... but I do plan to do some light off-roading. Do you guys advise against having the bike on the roof for any reason? My truck is lifted about 2" from stock. Thanks!