A short 4" refractor is only heavy if you are trekking to your camp site. If you are parking nearby then it is a piece of cake.
As is something like a C8 that gives you so much more aperture and reach and is just as portable. A C8 would give much better views of planets, comets and smaller galaxies, and still allow widefield via a f6.3 reducer.
If I had to carry it a long distance though, then get an ED80 or similar and a GSTAR EX video camera and a small 7" or similar screen.
You will get lovely views of DSOs in realtime that you could never see without a really large aperture scope, and get colour on things like orion etc. Video astronomy gets the best of both worlds, real time viewing just like visual, but detail and colour that is more towards CCD photography, but without the hassle it is the best of both worlds.
If the battery goes flat then just use the scope visually.
Whatever you choose, get a great pair of binoculars for true widefield work.
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