Guild Wars 2

For various reasons I am currently the only active player in my Guild on my server.
As such I don’t have much guild influence to spend and would like to accumulate more to purchase upgrades.
I don’t want to join another guild so I was wondering – is it possible to solo a Guild Bounty Training Mission? If not can non-guild members help?

It is extremely difficult to low man/solo a Bounty. Not only are they champions and do a ton of damage, but they also do not have a set spawn point. So you only have 15 min to locate and kill the bounty in order to succeed. Not to mention that Bounties only give you 6 min to kill them once activated, otherwise they will despawn and appear in a new location somewhere on the map. Realistically you need at least 5 people to do a bounty. Non-Guild members can help, but they get no rewards for helping. If you want more influence you are better off to just buy it with Gold, or recruit more members.