Hi Morton,
I had a Meade 4" SCT for years as a travelscope, originally purchased to see solar eclipses, as this worked quite well on a sturdy camera tripod which I still have. But it was a bit small for anything else - I used a 6" f/5 for astrophotography and a C8 for visual, as well as a fast 12" newtonian.
A 5" or 6" Mak would also work quite well as a travelscope, but the mount will be the challenge. I suspect that if you are prepared to lug the mount, you're rapidly gong to wish you has a 7" or 8" scope - the 6" Maks are a bit small for most things.
BTW I have two Maks - an Intes 180mm f/10 and a Skywatcher 180mm f/15, bigger than what you have in mind but they suit me fine.
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