Brillant light engulfs Mt Rainier Campsite (1966-67)

Was told I should report this to the best of my memory by friends. My parents often camped at this campsite near Tootle River (Creek?)where my father loved to fish. One evening during the Summer Months when I was about 16 yrs old after we retired to our trailer (among about 6 other trailers)we were woke up by a brillant light that engulfed the entire campsite. I was on the top bunk where I had a small window (10X24 inches) to look out of.  The light was of emmense bright light that made the trees appear almost white ... there was kinda a "sudden low base blast sound" which is hard to describe when it appeared (There was no visible craft to be seen - only light).  The light seem to come from straight above the campsite shining over the entire area.  My parents were sleeping in the dining/converted bed area where they had the bigger window, I remember My dad replying "What the SH&t is that?" and wanting to go outside which my mother urged him not too because she had a bad feeling about it, So they both stared at it through the windows. I could hear other campers making sounds of alarm and some movement.  I tried to see as much as I could through my tiny window but it was hard. Then suddenly the light blinked off and we were in total darkness again (as there were no street lights in the area).  I then heard one of the campers yelling at his family to pack up so they could leave.....hearing them drive off later.  But other campers stayed the night til morning. When we got up the following morning there was a Forest Ranger going to each of the campers asking questions and getting names of everybody. When he went to talk to my parents he said "I heard there was a bit of excitement here last night could you fill me in". My Mom looked at my Dad and then looked at me & my brother and told us to go down to the River, so I was unable to hear any other detail. But when we went back to the campsite, the other trailers were gone except for ours and one other.  My father refused to leave because he was determined to have his fishing trip.  That following night we were woke again t! o someth ing shaking our trailer violently which suddenly stopped as it began. We left the following morning. I don't know if this incident is searchable through Mt Rainier records or not but if someone remembers this, I sure like to find out more.
Date and time are approximate.  Does anyone else remember this event??  PD