Dressing properly, and planning for disaster should be part of your plan every time you ride. It really sucks to ride when you're feeling the cold. I went for a ride last Monday. Like you; went a little farther than planned. Ended up in a VERY windy place, with -20 wind chills standing still! Fortunately I had brought a couple extra pairs of gloves... so I could "donate" to the guy who just had normal ski gloves. Got a little worried about frost bite up there for the ones not dressed warm enough. Needless to say; we ski-daddled out of there pretty quick.
I always carry stuff to help with an unexpected overnight stay... survival blankets, tree saw, lighters and matches, rope, extra hat, extra gloves, etc.. You never know when you (or someone else) will need it, and it's too late to find out *after* you're 20 miles from civilization and a working cell phone tower.

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2000 ZL 550 (Solar Flare, #045/1000)
2000 440 Panther
1980 Jag 3000 F/C
"If it ain't broke, take it apart and find out why!"
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Canaltown Snowmobilers Inc.