Don't worry too much about the filter, like you I tend to get a little antsy when my oil is passed my regular schedule, usually happens on the road somewhere.....!
I have done quite a few roadside oil changes over the years without changing the filter, never had a problem with that. But I usually do the next oil change at around 2,500-3,000 Km to be on the safe side.
Just find someone with a junker and give them the oil for reuse.....!
I actually drilled a hole in my belly pan under the oil plug to make any "eventual" roadside oil changes easier, I will use an empty roll of TP as a funnel, it fits just right over the plug and will prevent the oil from going into the belly pan.
But your bike is so clean, you can just do it again, just use a clean Ice Cream bucket to drop the oil and reuse it......or if you have any doubts that there might be dirt in it, one of them Deep Fryer filter cones works great to filter the oil.
There ya go, I tought I could stick Ice Cream and Cooking in there.....now go enjoy the