We have an OP15. We love it. We use it as basecamp for family adventures - me, wife, our 13 year old. We don't climb much anymore, so usually that means biking, hiking, kayaking, that sort of thing. We've done a couple of extended road trips that way (one nearly 8 weeks) further afield, and then long weekends here in our general region (the midAtlantic, give or take). One such trip was described here, which will give you a sense of the unit in real live usage vice promo videos:
Sometimes when I'm training for a trek, trying to get some miles in, and I'm hopelessly bored with my local trails - I'll take the OP15 to some hipcamp a few hours away, near some other trails, and set up for 3-4 days, as a mobile office, doing some work around some training hikes. So it works great for that too.
I'd never hesitate to recommend the OP15 to someone if it fits your use case, and the quality has been pretty solid on ours. Especially in comparison to the problems I hear other trailer owners having.
For our OP15, we made two major upgrades/investments:
- We upgraded the electrical system to 360Ah of lithium ion batteries (fits in the same footprint as the factory 3 x 100 AGMs) and a RedArc Manager 30 system. I was going to add DC-DC charging anyways, and the integrated RedArc system just does much better with the solar and shore charging also than the factory stuff they were installing when we bought ours (2021 model purchased end of summer 2020).
- The awning worked just fine on our 8 week "distance learning" trip, because we were largely in the desert southwest. It may be all you ever need in the Sierra's also. However, back east here, first time I set up at Stone Mountain NC, in late March, and tried to cook outside, in a cold, windy, driving rain ... I realized either I was going to need to pack a jetboil and some foul weather freeze-dried meals I could cook inside, or we were going to need a more robust awning/annex solution, something like the OP4 offers. We found one, and that's all detailed also on Fakebook in the "Opus Campers Owners Group" (search on Kampa in the group, you'll find it; and join the group if you're considering a purchase, the group has been extremely helpful.) You may or may not need an annex, and we'd never set it up for a one night transit stop, but we've found it's a game changer for "basecamp" stops where we set up for 3-4 days in a place.
Hope that helps, and good luck finding one!
