We were able to get our popup to these sites but not necessarily recommended to even attempt to bring a trailer (ours is lifted with heavy duty tires) worth the risk because, Wow!! Perfect lake views, snow capped mountain tops, and wildflowers for days. We were sadly not allowed fires but this year we are getting tons of moisture in CO so we will head back up to Alta by summer, hopeful for fires again. Port a John's are rarely serviced, so if that's a deal breaker for you....and Please Leave No Trace!! This area is so beautiful, let's keep it that way.