It sounds like to me you are slipping out the 40 gate down to the highway. Or dropping the ropes behind Sunnyside or further down on Corona way. Either one puts you down to the highway. Good sidecountry. Avy danger is pretty much non-existant in those trees, but powder is abundant for sure. Probably about all I do is lap that area anymore. Be mindful if you start to slip out towards Zero Creek, there are some serious avy paths there and a few have met their demise.
For that sort of terrain you would probably be best off with an agressive freeride board. They will be ok for the park, but it doesn't sound like you do much park. Probably more pillowcases than anything. Neversummer Titan (very stiff), or Heritage (not as stiff), Unity Dominion, Flow Infinite, or Solitude series, Rome Anthem or Flag would be the boards I would look at.
Those will work pretty good for the hike to stuff at Berthoud Pass. Though a pintail like the NS Summit would be better. A pair of snowshoes will be a big help there from time to time. If you are really serious about BC, then a splitboard is the only way to go (I hate snowshoes). You'll be able to cover the same terrain all the AT and Telekooks do. The Blaho's make custom Neversummer splits. I had them make a Summit split for me and it's the best pow board ever (that's opinion). Prior, Voile, and Venture make great splits too. That is a whole nother topic though.
If you are getting into bc and haven't taken your level 1 yet, check out Friends of Berthoud.
They do avalanche clinics which basically cover level 1 material at a fraction of the course. You are required to attend a Halstead Morris (top 5 avalanche expert in the US possibly the world) avy clinic at one of the local gear shops. REI downtown D-town being one of the places. It's free. Then for something ridiculous like $30, Friends of Berthoud will take you on snow and show you what is up. I was a facilitator for them last year and plan on doing it this year. You'll need beacon, probe, and stuff to carry it in. I generally try to take mostly boarders in my group as it's easier to relate with 'em than all the other facilitators who are skiers. Definitely worthwhile as this state is by far the most dangerous to travel in the backcountry.