I've also been searching for a pet friendly vacation..... not sure how far you want to go, these websites have been helpful........ you can search by city/province/state, etc. or by type of vacation you're looking for (eg) cottage/beach/resort/motels
www.petfriendlytravel.com
www.dogfriendly.com
If this place- (
www.campdogwood.com) wasn't so expensive, we'd be going in Spring. It looks like a great doggie vacation! Although its near Chicago, and only runs 2 weekends a year.
Good luck!