strtspdlx
ArboristSite Guru
You'd be surprised how far a good plan goes when you need something to work. Do I expect to professionally log with my setup. No. I do expect I can drag full length trees out of the woods with the proper setup for my current quad.Judging from the responses so far, a 250 ATV probably isn't going to do what you are asking (look at the machines being posted as examples). It definitely will create some safety issues for you / your passenger. If you hope to gather wood and carry that much gear with your current machine a trailer would be your best bet., even at that it better be on flat stable ground.
Regards-Carlo