Which month are you considering for honeymoon vacation next week?
San Juan Islands, Vancouver BC would be beautiful and perfect weather for Jul. to Sept. where rain isn't much but it never gets overly hot/humid like Northeast U.S. / Canada. There's alot to see. There's also Vancouver Island which is large with choice kayaking areas for whales etc. at various times. There are also wineries on Vancouver Island. The Washington State Ferry does have daily stop in Sannich area, Vancouver Island that is less 5 km. away from B.C. Ferries port stop. From B.C. Ferry Swartz Bay stop, you can ferries, to Canadian Gulf Islands..I would recommend Saltspring Island...it is a different feel than San Juan Islands. Saltspring has 2 wineries, a very popular Sat. farmers', arts market in Summer and Fall, hiking, cycling on roads, etc.
Banff, Alberta leads ...120 kms. north of Calgary has a whole swath of Rocky Mountains, parks (not just Banff National Park), Lake Louise, etc. And then heading towards the Alberta, B.C. border there are several national and provincial parks with more wilderness, sightseeing, hiking, etc. Summer accommodation would be more expensive. I am not familiar with camping in the Rocky Mountains but no doubt you need to book way in advance. Meaning months in advance.
Feel free to email me since I've lived and travelled in both Vancouver BC /islands and Banff, Alberta area. For slightly lower rates in accommodation and some less crowds,starting just after Labour Day would be still wonderful weather for cycling, hiking, etc.