The White Mountains is a BIG area with a LOT of choices and price ranges........
Check out Waterville Valley---of the resorts associated with the ski area I've stayed at the Snowy Owl Inn as well as the Black Bear condos.
I love the Mount Washington Hotel - an wonderful old "grand resort".
Loon and Attitash as othe posters have suggested also offer a variety of options in wide price ranges and both great areas.
Jackson NH has a lot of great B&B establishments.
Conway area traffic is HORRIBLE I haven't been there in years LOL
As far as the Lakes Region I live too close for it to be a leisure destination ...but I've stayed at the Inn at Mills Falls (for business) across the street from the Winnipesaukee lakefront in Meredith, nice place but too me it doesn't offer much as far as location...probably because I prefer the White Mtns rather than the lakes region...Winipesaukee is overly developed IMHO. The Inn is basically in a commercial area....though the lake is across the street and if you have a nice view it's fine but there are no "grounds" to speak of. The Margate in Laconia is another place I've stayed on business, it is a lakefront resort with more vacation -type amenites than the Inn at Mills Falls...IMHO.
If you're doing on-line searches check out places on Squam, ("On Golden Pond" location, Winnisquam, Newfound, as well as Winnipasaukee.
Have FUN!
