Hi Island Girl.
H K Powersports, 1197 Union Ave Rte 3 Laconia. 524-0100
For Accessories; Jack Willey's
www.jackwilleys.com 524-9645
You can get gas at Weirs Beech near WaldoPepper's, also I recomend getting as many locale Trail maps for the area around the Lake that you will be riding and keep them with you on your sled. They show you the gas stops.
The camera is the hard part. With my old cmera, 35mm, I just strapped it around the hanlebars in its carry case. Never had a problem.
With my new camera, I ware it around my neck inside my snowmobile jacket.
Don't know if this would work for you, but I'm shure more help is on it's way and you will figure it out.
Happy Trails to you and I'm looking forward to more of your winter addventure photo's here!!
Hope this helps.