My azz hurts!
Tom
get an Air Hawk seat cushion. \\;\\\\\\; when the ol butt starts to bleed the color wont be as important!!! besides you can take it off and throw it in the bags while yur stopped. \\;\\\\\\;
 \\;\\\\\\; \\;\\\\\\; \\;\\\\\\; those softtail bikes are sure Great Lookin \\;\\\\\\;machines,  \\;\\\\\\;but they aint long mile riders!!
Gets my vote, and trust me, I know what a SORE **** feels like.
 \\;And throwing it in the bags is good, too. (Cept I ain't gots them, either) I always \\;felt it was cheating to use one, but when I see 30 yr olds showing up in Sturgis with 2 baggers on a trailer, that feeling goes away REAL qwik. 
Hardtail, hard a$$, and hard head, I jus' keep on pounding. OKAY, okay, it is more like cringing, than pounding.
 \\;Also, have you tried a sheepskin cover? They work pretty good also.
I wear some Wrangler loose fit carpenter jeans, along with Haines athletic undies, the kind that fit from the waist to about mid thigh with no seams in the back and a nice pocket for the jewels. They're thick and absorbant, plus with the soft pocket seams in the Wranglers, I'm comfortable for an all day ride....in Texas 100+ humid heat and skin blistering sunshine.
I also stop about every hour to hour/half to smoke a cig, drink water and walk around.
This works for me and my 300-350 mile day trips....I have yet to try a big cross country like you're doing though!
B.S.! to all the anti softtail guys out there, my butt and back both perfer the ride of my Fat Boy over any other model of H.D. currently on the market. (And I havent even added the air ride yet!)
The Best of Harley-Davidson for Lifelong Riders
A Sheepskin Buttpad can help. So can going commando.

Never had a problem with the stock seat on my 03 Heritage or the 06 Ultra. Made several 6000 mile plus trips with both. Longest day was 1158 miles.






