I have unfortunately had many similar experiences. i call it the curse of the trailer. it seems every time i hitch one on the back of the car i come across a musth bull elephant.
my most recent experience happened on the 7th of January this year on the morning i was leaving the park. we came across two stopped cars who had stopped some 20m away from an elephant who looked like he had given them a bit of a rev. i stopped behind the cars and we all waited for him to disappear however he continued to graze on a tree right next to the road.
Eventually i decided to edge forward very slowly and stop a bit closer to him. i noticed that although he carried on feeding he was definitely very aware that i had come a little closer (now about 12m away) he continued feeding for a short time but then suddenly swung his head around and walked straight up to the car ears flapping and tummy rumbling. i stood my ground only because i had no choice. We had a stand off (now about 2m from the, and looking like the biggest elephant i have ever seen in my life!!

) after about a minute he swung his head around and started to walk off the road.
At this point i thought i had won the stand off and he had backed down. However my victory was short lived as he suddenly decided that he wasn't going to be intimidated by me and he turned again and rushed at the car from the side (this time he stopped about 1m away). The stand off continued because i knew if i tried to drive away he was going to go for me and he definitely would have got me because he was way to close. Suddenly he went down on his front knees and his was my chance, I’m not sure what his next move was but i knew exactly what mine was. Foot flat on the accelerator and out of there! He got up and gave us chase for about 40m before giving up.
Now with the nerves completely rattled we were all joking in the car about what each one of us was doing during the stand off. One was apparently swearing at me(Mom) the other was looking out the window on the opposite side of the car (sister) and the third was eyeballing the elephant in a complete state of shock (Dad).
As we laughed and drove over the next rise guess who we see walking down the road straight towards us??????????????
Yip Musth Elle No2 for the morning. This time we had enough time to reverse the trailer into an opening in the bush and do a u-turn and we sped off back towards Elle No1 who was about 2km away at this stage. We decided to get out of view of the 2nd elephant with the Theory that if he couldn't see us then he might loose interest in chasing cars and wonder off into the bush. So we stopped on the road out of view and had a cup of coffee to pass the time. No sooner had we poured the coffee and i noticed something running in the road way in the distance. So down with the coffee mugs and off we go to investigate. I couldn’t believe it, a pack of wild dogs on the prowl. Thank you elephant number 2 for making us turn back on ourselves!