Follow 93 from Whitefish up the the Canadian Boarder at Roosville. Once you get to Hwy 3 head west towards Cranbrook, and before you get to Cranbrook you will come to a Hwy Jct ( 3 & 93/95) take 93/95 north towards Farimount Hot Springs / Radium Hot Springs.
About 4 miles from this Jct is the Heritage Site of Fort Steele, great place to stop for a look at a 1890's MWMP outpost.
There are a couple of campgrounds near Fort Steele however if it were me I would make a reservation and stay at Premier Lake PP.
Fort Steele Across the Hwy and up a couple hundred yards is an Esso Station lots of room for a truck and 5th Wheel , diesel pump is on the left as you pull in.
Fairmount Hot Springs or Radium Hot Springs both have campgrounds, do a bit of research to find what you like there as also a couple of BC Provincial Campgrounds on this route.
Premier Lake and Whiteswan Lake
Premier Lake is on a paved road 10 km off the main Hwy. and reservations should be made
Premier Whiteswan lake is 25 Kms up a gravel road there are also Hot Springs up there called Lussier Hot Springs.
WhiteswanFrom Radium to Banff it is about 1.5 hr drive, ( non-stop) however you will most likely have a park pass and will be stopping a lot to see the sights in Kootenay National park on the way.
Soup.
2018 Northern Lite 8-11 EX Dry Bath
2017 Sierra SLE, 3500 HD / 4x4 / Duramax with a 6 speed Allison Trans
Torklift Super Hitch 20K, 48" Super Truss, front and rear frame mounted tie downs
Fast Gun Long Range SS Turnbuckles, Fast Gun locks