Originally posted by Fzanco:

I'm doing a run where I'm basically doing this, I don't build any static base I keep all base building gear with me on a boat and cart setting up what I need when I need it temporarily from island to island

I used to run with copper and coal to make a forge to repair my stuff along the way (since almost all the other materials i can easely obtain in the enviroment), but now i just carry the stuff to do a portal to return, repair stuff and unload materials. Specially since metals weight too much and keep carrying 6 ingots of copper (because we cant portal them) and the forge and kiln need surtling cores (which also weight a lot). A mobile base would need also 10 tin for the cauldron and some bronze for the fermenters, plus the boat's materials, which is just not feasable on foot.

Although traveling with a cart is a possibility, the speed to pull it around makes it not worth it. And boats barely have any storage till you get iron nails, unless you do the trick of putting the cart in the boat.

All in all, if you carry a cart and have a boat with a cart inside (or just the big boat) you technically can have a mobile base as long as the boat dont break and you're willing to pull the cart around. That or carry materials to make 2 portals: one at the shore by the boat and another while exploring (but then that wouldnt be that different from just portaling around to your base)