There are a couple of simple approaches that would work.
If you have a system tripod that lets you swap the tripod head, Manfrotto do a 183 aluminium projector table attachment (https://www.amazon.co.uk/Manfrotto-183-Aluminium-Attachment-Projectors/dp/B001HS697C) that attaches to the 3/8" thread usually used for the tripod head.
Or, if you have access to the appropriate tools, you can tap a 3/8" or 3/4" threaded hole into a metal block, and screw that to the bottom of a piece of wood for a DIY equivalent - that's what an uncle of mine did years ago when I was a youngster :).
Depending on the design of your mini dob, you might be able to attach a similar block to the bottom of your baseplate. (As a side note, I think there are a few mini reflector scopes around that already have a tripod socket in the base - Though tripod sockets are a lot more common with small refractors, maks, and spotting scopes, since they're usually designed for use with a tripod in the first place)
If you want to go the photo tripod plus platform route, and you want to keep the weight down, then if your budget is big enough, it may be worth looking at one of the carbon fibre tripods. They're more expensive, but noticeably lighter - which can feel like a bargain if you're lugging one around all day... They also have the advantage of not freezing your fingers off after a session outdoors in cold weather.
if you're looking for a more compact tripod, it's fairly common to find similar models with different numbers of leg sections - for example, 3 or 4 section legs. The 3 section ones are longer, compared to the 4 section versions, so they're bulkier when closed - but tend to be a bit more stable than the 4 section ones since they have a thinner fourth section (to fit inside the other three).