Here in the South East Region, $30 to $35 is the normal entry for an IMAC event for an IMAC member.
There is no set amount, this is up to the club and/or CD
Some include meals, some don't.
There is a $3 per pilot fee that must go to IMAC. This helps with Regional trophies and expenses.
There are always set costs in a contest as well... score sheets, unknowns, printing supplies, office supplies, etc. etc.
I cannot comment on internal issues at your club, as I am not a member there...
but the Camden contest is always well run and we hope the issues can be resolved.
If you have questions, feel free to contact me
South East Regional Director