I don't think Hadley is more than 15 minutes...if that far away from Alpine.
I am not sure about site 76..I will be up there the end of this month and will check out the site number for you ...let you know about it.
Alpine is a nice RV Resort...conveniently located between both Saratoga and Lake George. They offer trolley transportation to both spots on weekends. New owners there for this year( they actually purchased the resort the end of last season)...same company that owns Tropical Palms in Fla.
I do see on the map that your site is at the end of a row..which is better since they can be close together in some areas...but I don't think it is there. I do see it's near a restroom...but the showers are located in the Laudry/Shower building. You are also pretty close to the really nice new playground area. It isn't even on the map I have..but it is located right near the showers/Laundry also.
Also...the directions they give you to the campground are from the Northway..for when you are trailering..to make things easier..no turns or hills..you will pass the area for Saratoga..the historic town and race track..but if you are looking to get over to the Lake George area...no need to go all the way back to the Northway...there are local roads that take you over the river to Aviation Rd...which brings you right to RT.9 where all the Lake George attractions are located. Be sure to ask at the office for directions if you need to get over to that area. ( or you can pm me)...There are rowboat and kayak rentals at Alpine if you don't have your own. There is also fishing and swiming in their lakes. I'm sure you will enjoy your stay.