We are flying into Vancouver to visit our Son on 26th June, and would like to go to visit the Rockie

We are flying airline travel with child into Vancouver to visit our Son on 26th June, and would like to go to visit the Rockies. Need to now best method of travel and time scale as we are only there for two weeks.At present we have been looking at hiring an RV.
Or, if you drive, you could either (1) drive it in one shot each way, a long 12 hour plus drive without stopping for any of the awesome scenery. And since much of the road is a winding, mountainous, 1-lane in each direction, you will need to add on time for getting stuck behind campers and big rigs.
Or, you can drive it as a 2-day very pleasant tour each way. I fear that will not leave you much time to explore the Rockies in your timeframe, but it would be my preference. If you do have the time and can do that, we'll be happy to help with some suggested routing. It would be less expensive and less stressful (remember those mountain roads) than an RV.
We've always wanted to do the train, but it is rather expensive. And Jasper is less touristy than Banff, just splendid. Of course Banff and Lake Louise are as well. Keep in mind that Jasper is NOT a day trip away from Banff, though - allow about 1/2 day to drive. And you'd be driving along the Columbia Icefields Parkway, so count on lots of picture stops.
If you have two weeks to visit the Rockies from Vancouver, that's plenty of time for a nice leisurely round trip. Whether you rent a RV, or rent a vehicle to drive and stay at hotels, is up to your preference. Note that the end of June and beginning of July is into prime tourist season, so rates go way up, and any accommodation should be reserved ahead of time. Campground need reservations too. For the mountain parks, check out this website:
For your itinerary, I would suggest taking one day to drive Vancouver to Kelowna (it takes about 4 hours depending on the traffic and most of it is four lane divided highway if you drive the Coquihalla - the quickest route). You may want to spend a day in the Kelowna region - pretty airline travel with child mountainous airline travel with child country along Okanagan Lake and wine growing region.
We have been looking airline travel with child at flight prices from Vancouver to Calgary,as we only have time for one week in the rockies,as hoping to spend some time in vancouver with our Son.Need to decide whether airline travel with child to use buses from airport or hire a car as we hope to be there for four days and do Lake Louise and Banff.
You are referring to Calgary airport? If so, get a car. Once away from Calgary, the public transportation options are more awkward, and it's really a car driver's domain. With your time limitations you don't want to spend an undue amount juggling limited public transportations. You will be in Banff in only an hour or two, but it will seem like a world away.
Flying in to Calgary, rent a car or RV if you enjoy independence in your choices of where/when in the Banff/Lake Louise areas. Borealis has given you a great link for campground reservations, I would add that not all campgrounds accept reservations so that *might* open other possibilities for you to consider. Not sure of your travel dates but note that July 1 is Canada Day, and a very busy long weekend (holiday Monday), for roads and accommodations. Plan accordingly!
I too have a problem trying airline travel with child to fit everything in. We want to go from Vancouver to Quebec - the best and cheapest airline travel with child way seems to be the Canadian (VIArail)but we will only see a very limited airline travel with child amount of the RockyMountains airline travel with child and will miss Banff and Lake Louise is there any way to get there without a car - any buses or coaches or anything!!
Yes, Take the Canadian from Vancouver to Jasper and either rent a car or take a Brewster tour from Jasper. The Brewster counter is in the east half of the ViaRail station. The next Canadian comes into Jasper 2 or 3 days later.