we didn't have many 100k routes either but DH made some new ones, including the one we just did that starts 3 miles from my house !
I would be happy to do the same ride 12 times, it's only once a month, i like routine anyway.

TsPoet, you probably can't do it with a shell, but if you get some wheels and stuff in there you should be fine.

Azfiddle, sorry about the typo, 100K or 62 miles..