Yes, you can do the BRAG. With all your regular exercise and riding during the 2 at-home weeks, you got this. [MENTION=106798]10 Wheels[/MENTION] makes a very good point about breaking in your bum!
My weakness would be the day-after-day riding, so that's what I'd work on during the home weeks - starting with 3 days of 25 miles per day, then a total rest day. But that's me and I don't work out 6 days a week!