At some point PHP5.6 will no longer work. When that happens then the both the forums and Joomla will crash literally overnight. The crypto thread gave a Pam a good idea and I ran with. Here is one way to move forward without PHP5.6
Step 1 - Forums:
Upgrade to the latest version of IP.Board. This will use a recent version of PHP and no data will be lost.
Step 2 - Sell Trips:
Move payments over to Zelle and Venmo. These did not exist when the current site was built. You will have to create an invoice for each initial purchase to track what it is for. They submit the invoice number with the payment. Partial payments and one time payments won't necessarily take an invoice. Track sales the way you currently do in the forums. Joomla is retired.
Step 3 - Forms:
Move forms over to Google Forms or SurveyMonkey. You can copy a form over for each trip and send the links when they are added to the Trip PM. Both of these output the data to an Excel spreadsheet so they are perfect for this job.
that's it...
Issues
1) Obviously some variation of creating an invoice needs to be created. Word, Google Docs, whatever
2) The new forums don't use the same membership module. Someone needs to check if the data ports. I think it does.
3) Preferably you can drop Forte and move to Stripe for membership only. Stripe is supported by the new forum membership app. Stripe won't be used for anything else.
This process give you a new system that takes no development or integration and it is both maintainable and easily modified.