For a 2 day trip, you might consider running your filters. Get a large rubbermaid tub (20-30 gal) with lid, drill holes to fit tightly a canister filter's in/out port (so no spills) then run your filter with an inverter off your car while driving (plug in land line when parked so you don't drain your battery). Leave some room in the top of the tub for air (& maybe some small holes & an airpump for air exchange) Put all compatible fish & the rest of your media in this tub.
Keeping the water circulating the whole trip would be safest for all the fish & biobugs. For a 2 day trip, you might be OK with just bagging the fish & the filters .... although I would try using breathable bags for both. <The biobugs also need O2 in addition to water.>