Apologies for the prolonged post........ please bear with me. My partner and I intend to visit the USA / Canada circa mid May to the end of June 2017. We are botanical enthusiasts and adore the flora of Nth America, we find much to see on quieter back roads and avoid crowds if and where possible. The prime reasons for our trip are to see parts of the Rockies (mostlty Pacific side watershed) in spring / early summer growth conditions and enjoy photographing plants in habitat and light-ish hiking around any glorious landscapes and wildlife that tend to happen in this part of the world. We would be be flying into SFO via New Zealand to visit an old friend, then taking a flight from SFO or from somewhere in the Bay Area over the Sierra to pick up a hire car closer to our starting point ( these details I need advice upon too) With 12 months to organise this trip, I'm planning a 6 week road trip. We have done a pair of 6 week road trips through CA/OR/WA at same time of year back in 2011 and 2014 so we are familar and appreciate somewhat, huge milage, slow back roads, Memorial Day weekend crowds, other major attraction crowds and the lottery of weather conditions and certain places and roads being open/closed - accessible/inaccessible. Ideally I'd like to start on the Nth rim of the Grand Canyon and work our way up through Utah into parts of Wyoming, Idaho, Montana and over the border into Alberta and over the Rockies into BC. We try to break up the trip by staying in one place for 2/3 nights then drive a significant distance to stay in another key location for another 2/3 nights etc. We would like to visit the Pando quacking aspen tree stand at Fish Lake in central Utah which appears to be a little visited location (not so touristy) Places like the Grand Canyon (Nth Rim only), Zion NP, parts of Canyonlands, Sawtooth Mts, Tetons, Yellowstone NP and Glacier NP we will take or leave as weather / time permits. Then into Canada to see Banff, Jasper, Kamloops and Vancouver with commensurate crowds and then a visit to the Butchart Gardens on Victoria Island at the end of the trip. Questions :- 1) I am dreaming just contemplating this much in 6 weeks? We did 2,800 miles in 6 weeks in 2014 quite comfortably..... 2) If so (dreaming) - as we are fairly flexible being 12 months out what to drop off the trip to shorten it - Canada at the end of the trip is set in concrete. 3) What great botanical photo locations have I missed out on in my descriptions here (has to be plenty I suspect) 4) If we visit the Nth Rim, where best to fly to from San Francisco to rent a car? 5) Where to stay (either motel room or small/cheap AirBNB house for these locations? Any other advice / comments / critisisms are most welcome as I've had to scrimp and save like never before to put this trip together and it may be our last to the USA together so I really want to maximise our time away.